From: cmoore@ARL.MIL Date: Thu, 1 Jun 95 18:32:21 EDT Subject: history.of.area.splits Last updated: 1 June 1995 by Carl Moore Thanks to various readers of TELECOM digest for their help, especially to Mark J. Cuccia for sending me various notes and charts to fill out gaps in the early history of area codes. North American telephone numbers in country code 1 are of the form +1 AAA BBB BBBB, where AAA is the area code BBB BBBB is the local telephone number (first three digits are the prefix) The following area codes were used in the United States (just the 48 states and DC), according to a map in "Nationwide Numbering Plan" article by W. H. Nunn (Bell System Technical Journal, Sept. 1952). Off the map are Alaska (now using 907), Hawaii (now using 808), and Puerto Rico and the Virgin Islands (now part of 809); Alaska and Hawaii were not states. (1947 is the earliest year for area codes, so codes not existing then are specially noted.) Alabama: 205 Arizona: 602 Arkansas: 501 California: 213,415,714,916 (714 did not exist in 1947) Colorado: 303 Connecticut: 203 Delaware: 302 District of Columbia: 202 Florida: 305 Georgia: 404 Idaho: 208 Illinois: 217,312,618,815 Indiana: 219,317,812 (219 did not exist in 1947) Iowa: 319,515,712 Kansas: 316,913 Kentucky: 502 Louisiana: 504 Maine: 207 Maryland: 301 Massachusetts: 413,617 Michigan: 313,517,616 Minnesota: 218,612 Mississippi: 601 Missouri: 314,417,816 (417 did not exist in 1947) Montana: 406 Nebraska: 402 Nevada: 702 New Hampshire: 603 New Jersey: 201 New Mexico: 505 New York: 212,315,516,518,716,914 (516 did not exist in 1947) North Carolina: 704 North Dakota: 701 Ohio: 216,419,513,614 Oklahoma: 405 Oregon: 503 Pennsylvania: 215,412,717,814 Rhode Island: 401 South Carolina: 803 South Dakota: 605 Tennessee: 901 Texas: 214,512,713,915 Utah: 801 Vermont: 802 Virginia: 703 Washington state: 206 West Virginia: 304 Wisconsin: 414,715 Wyoming: 307 Same source has these area codes for Canada (Newfoundland joined this federation late): Alberta: 403 British Columbia: 604 Manitoba: 204 New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland/Labrador: 902 (only New Brunswick is on map) Ontario: 416,613 Quebec: 418,514 Saskatchewan: 306 Yukon and Northwest Territories are off the map. Until 1973, area codes were only of N0X/N1X form and prefixes were only of NNX form. Both later generalized to NXX form. In July 1973, area code 213, the first to do so, began allowing N0X/N1X prefixes. Then area codes began running short, so NNX area codes began to appear in January 1995 (specific codes began to be announced in July 1993). The above-mentioned generalizing of prefixes was an alternative to splitting an area immediately, and as a result, long distance dialing instructions for the affected area usually became: 7D (if not already in use), or 1 + NPA + 7D, within area (no longer 1 + 7D); 1 + NPA + 7D (if not already in use) to other areas (no longer NPA + 7D); for 0+ calls, try 0 + NPA + 7D (no longer 0 + 7D within area). Otherwise, some calls would require timeout to complete. Except for 0 timing out and calling the local operator, I know of only two cases where published instructions led to some timeout situations. They were: the continued publishing of 0+7D within area 213 in California; and the non-removal of 1+7D and 0+7D at Denver and Adamstown (Pa.) when those places were in area 215. (These cases are noted elsewhere in this file.) The new dialing instructions (for areas having N0X/N1X prefixes) are set up so that the leading 1 (or 0) means that what follows is an area code. These same instructions accommodate the NXX area codes, and thus became universal by the deadline (1 Jan 1995) for switches to be able to handle NXX area codes. Such deadline was previously 1 July 1995. It was thought that the first batch of NNX area codes would be of NN0 form, so that some areas could keep 1 + 7D for intra-NPA long distance by disallowing prefixes of NN0 form. This would have been affected by use of area codes 52x (x not 0) for Mexico, and was affected anyway by the first announcement of an NNX area code on 22 July 1993 (334, to be formed in 1995 by splitting 205, which had served all of Alabama). It is unclear how generalizing area codes to NXX would affect the policy of not using N0X/N1X prefixes until NNX starts running short. I found an exception to the above dialing instructions in February 1992 for 215-267 (Denver) and 215-484 (Adamstown) in Pennsylvania. These exchanges, served by Denver & Ephrata Telephone & Telegraph (also serving Ephrata in 717 area), were still using the old instructions (1 + 7D and 0 + 7D within area code), even though this necessitated timeout resolution for some calls. Elsewhere in this file, it is noted that these prefixes later moved to 717, with Denver having to use 717-336. The suggestion (at least from Bellcore) has been seen that ideally, all calls should be makeable as 1+NPA+7D (this does not necessarily forbid shorter forms). These areas prepared for N0X/N1X prefixes before it became necessary to prepare for NNX area codes: 213 California, July 1973 (7D on all calls within it) (now 213/310/818, to become 213/310/818/562) (but for some time, this area continued to publish 0+7D instruction for within-NPA 0+ calls) 212 New York, some days after 24 Nov 1980 (7D on all calls within it) (now 212/917/718) 312 Illinois, Oct 1982--but got 1st N0X/N1X spring 1983? (7D on all calls within it) (now 312/708/630, to become 312/708/630/847) 201 New Jersey (7D on all calls within it; also applies to 609) (now 201/908) 214 Texas, 1986 or 1987 (by July 1987) (1+NPA+7D on all toll calls; also applies to 817, at least in Fort Worth area) (now 214/903, to become 214/972/903) 301/202/703 Maryland/DC/Virginia, 1987, due to DC area growth (1+NPA+7D on all toll calls) (301 now 301/410) (703 to become 703/540) 415 California, Feb 1989? (7D on all calls within it) (now 415/510) 404 Georgia, Oct 1989? (1+NPA+7D on all toll calls; also applies to 912) (now 404/706, to become 404/770/706) 919 North Carolina, 2 Mar 1990 (1+NPA+7D on all toll calls; also applies to 704) (now 919/910) 416 Ontario, 3 Mar 1990 (1+NPA+7D on all toll calls) (now 416/905) 602 Arizona, 1 July 1990 (1+NPA+7D on all toll calls) (now 602/520) 313 Michigan, 1990? (1+NPA+7D on all toll calls) (now 313/810) 512 Texas, 9 Sept 1990 (1+NPA+7D on all toll calls) (now 512/210) 205 Alabama, Dec 1990 (1+NPA+7D on all toll calls) (now 205/334) 215 Pennsylvania, 20 May 1991 (7D on all calls within it; exception noted above for Denver and Adamstown, which later moved to 717, but the new instructions also applied to: 717-354,355 New Holland 717-656,661 Leola 717-768 Intercourse) On 25 September 1993, I noticed that, during permissive dialing during the 215-to-717 change for Denver and Adamstown, all long distance from there was to be dialed as 1+NPA+7D, with 0+NPA+7D for all 0+. After full cutover to 717, "1 717" was dropped, and by then the local calls between Reading (moved from 215 to 610) and Adamstown were 1+NPA+7D. (now 215/610) 206 Washington state, 12 Jan 1992 (1+NPA+7D on all toll calls) (now 206/360) 713 Texas, 8 Mar 1992 (permissive dialing 8 Dec 1991) (1+NPA+7D on all toll calls) (now 713/281) 714 California, 1992? (7D on all calls within it) (now 714/909) 503 Oregon, 10 July 1993 (1+NPA+7D on all toll calls) (to become 503/541) No note about N0X/N1X prefixes (due to closeness to the time for area codes to generalize to NXX), but instructions changed to accommodate the generalized area codes: 305,407,813,904 Florida, 7 Mar 1992 (at least for 813) (1+NPA+7D on all toll calls) 603 New Hampshire, 17 July 1993 (This was to include all New England areas except Connecticut, with changeover to 7D on calls within area code to be done in 1993-1994, but this list now has separate entries for Massa- chusetts, Vermont, Rhode Island, and Maine.) (7D on all calls within area code; per-line option [for toll within area code] to block 7D and require 1+NPA+7D, but 1994 Portsmouth directory merely said 7D or 1+NPA+7D for this) 413,508,617 Massachusetts (order by public utility commission in Oct 1993; in 413, mandatory 1 June 1994; eastern Massachusetts followed later in 1994; in 508, permissive 15 July 1994; in 508 and 617, mandatory 15 Oct 1994) (Earlier, for 413 going to 7D on all calls within area code: Feb- June 1993; full cutover 21 Sept 1993; 1+NPA+7D for local calls to another area code permissive 1 Mar to 8 Apr 1993.) (1+NPA+7D on all toll calls) 802 Vermont, permissive 18 Feb 1994, mandatory 18 May 1994 (1+NPA+7D on all toll calls) 401 Rhode Island, announced Jan 1994 (but when to be implemented?) (1+NPA+7D on all toll calls) 207 Maine, 15 July 1994 (1+NPA+7D on all toll calls) 303,719 Colorado (27 Feb 1994); 612,507,218 Minnesota (late 1994); 319,515,712 Iowa; 701 North Dakota (19 June 1994, full cutover 3 Oct 1994; 605 South Dakota; 308,402 Nebraska (full cutover late 1994 for Lincoln Telephone area); 505 New Mexico (14 Feb 1994, full cutover 19 Jun 1994); 801 Utah; 307 Wyoming; 406 Montana; 208 Idaho; 509 Washington (15 May 1994, full cutover 17 Sept 1994); 1993-1994 (U.S. West areas except Arizona, Oregon, 206 in Washington state) (1+NPA+7D on all toll calls) (303 now 303/970) 219,317,812 Indiana, c. Aug 1993 (full cutover 1 Dec 1993) (1+NPA+7D on all toll calls) 615 Tennessee, 1 July 1993(?) (full cutover 1 Sept 1993) (1+NPA+7D on all toll calls) (to become 615/423) 901 Tennessee, Sept 1993? (1+NPA+7D on all toll calls) 803 South Carolina, Sept 1993? (1+NPA+7D on all toll calls) (to become 803/864) 502,606 Kentucky, 4 Sept 1993 (full cutover 2 Apr 1994) (1+NPA+7D on all toll calls) 318,504 Louisiana, 4 Sept 1993 (full cutover 2 Apr 1994) (1+NPA+7D on all toll calls) 209,408,619,707,805,916 California; Pacific Bell, by 11 Oct 1993 (full cutover for all points on or before 11 Oct 1994) These are the California area codes not cited above, as of Feb 1993, as preparing for N0X/N1X prefixes; but some of these, in whole or in part, already had the new instructions. GTE areas: 0+NPA+7D for 0+ within own area code permissive 11 Oct 1993, fully cut over 10 Oct 1994; direct-dial not affected. (7D on all calls within area code) 412,717,814 Pennsylvania, for 717 1 Nov 1993 (full cutover 31 July 1994), for 814 8 Nov 1993 (full cutover 1 Aug 1994); announced Sept 1993 (7D on all calls within area code) I found 1+NPA+7D on all toll calls in use in some places not served by Bell. These include pay phones on: 814-634 Meyersdale, 4 July 1994; 717-533 Hershey, 19 Nov 1994. 716 New York, 5 Dec 1993 (at least for Rochester Telephone; is this permissive or mandatory date?) (7D on all calls within it) (but on 1 June 1994, NYNEX announced 1+NPA+7D on all toll calls, for its portion, including Buffalo, of 716 area) 601 Mississippi, Dec 1993 (1+NPA+7D on all toll calls) 302 Delaware, 1 Apr 1994 (full cutover 7 Jan 1995) (1+NPA+7D on all toll calls) 304 West Virginia, full cutover 1 Jan 1995 (earlier, saw 16 or 30 Apr 1994 for 1+NPA+7D for local to other area codes; and 30 Apr 1994, with full cutover 1 Oct 1994, for 7D on all calls within area code) (1+NPA+7D on all toll calls) 517,616,906 Michigan, 1994 (1 May in 517 & 616; 1 Feb 1994 in 906) (1+NPA+7D on all toll calls) 808 Hawaii, 19 June 1994 (1+NPA+7D on all toll calls) 314,417,816 Missouri, July 1994 (1+NPA+7D on all toll calls) 316,913 Kansas, July 1994 (1+NPA+7D on all toll calls) 405,918 Oklahoma, July 1994 (mandatory 1 Jan 1995) (1+NPA+7D on all toll calls) 501 Arkansas, July 1994 (1+NPA+7D on all toll calls) 409,806,915 Texas, July 1994 (also applies by then to 817 outside of Fort Worth area?) (1+NPA+7D on all toll calls) 702 Nevada, July 1994 (1+NPA+7D on all toll calls) 519,613,705,807 Ontario; 418,514,819 Quebec; 204 Manitoba; 306 Saskatchewan; 403 Alberta (and Yukon and NW Territories); 506 New Brunswick; 604 British Columbia; 709 Newfoundland (and Labrador); 902 Nova Scotia and Prince Edward Island; 4 Sept 1994 (all of Canada except 416 and 905 in Ontario) (1+NPA+7D on all toll calls) 315,516,518,607,914 New York, 1994? (mandatory 24 Sept 1994, at least in 516 & 914) (7D on all calls within area code) (note that "PSC may ask telcos to provide option for mandatory 1+NPA+7D on all toll calls at subscriber's request" for 315,518,607) 217,309,618,815 Illinois, 1994? (7D on all calls within area code) 216,419,513,614 Ohio, 1994? (full cutover 1 Jan 1995) (but in late Dec. 1994, I saw a notice for 216, at least for a part of it along Ohio Turnpike: permissive 1 Jan 1994, mandatory 1 Oct 1994) (1+NPA+7D on all toll calls) 414,608,715 Wisconsin, 1994? (1+NPA+7D on all toll calls) 817 Texas, 1994? (already in use in & near Fort Worth) (1+NPA+7D on all toll calls) 203 Connecticut, 1994? (seen in Southern New England Telephone directories which were not to be used before 25 Apr 1994; what about the NYNEX part in the southwestern corner?) (1+NPA+7D on all toll calls) 804, Virginia, 16 May 1994 (full cutover 16 Nov 1994) (1+NPA+7D on all toll calls) 907 Alaska, 1994? (full cutover 1 Jan 1995) (1+NPA+7D on all toll calls) 809, Caribbean area (full cutover 9 Jan 1995) (1+NPA+7D on all toll calls; one exception: St. Vincent, Turks & Caicos to use 01+NPA+7D on all toll calls) Areacode splits and realignments: Early ones might not have been announced publicly due to lack of direct-dial facility at the time. Early splits could be guessed at with the following guidelines (reference is page 856 of the Sept. 1952 Bell System Technical Journal, in the article "Nationwide Numbering Plan" by W. H. Nunn): If an areacode is of form N1X, it is in a state or province with more than 1 areacode. (The reverse is now obsolete.) If an areacode is in a state or province with only 1 areacode, it is of form N0X. (The reverse is now obsolete.) List of splits and realignments: 317/219 Indiana, 1948? (realignment of 213/415/916 California, 1950? The earliest area code maps have only those three area codes in California, and appearing in that order from south to north, with both boundaries running from the Pacific Ocean to the Nevada state line. In the realignment, a triangular wedge along the Nevada state line shifted from 415 to 213; and afterwards, to the north of 213, 415 touched the Pacific Ocean and 916 touched the Nevada state line, going all the way north to the Oregon state line.) 816/417 Missouri, 1950 914/516 New York, 1951 213/714 California, 1951 415/318 California, 1951 318 was used for San Francisco only, during the Englewood (N.J.) Customer DDD Trials; Oakland remained in 415. Sometime before 1957, 318 was reclaimed for future use, and San Francisco returned to 415. 416/519 Ontario, 1953 (519 also took part of 613) 305/813 Florida, 1953 This and the 405/918 split were the first splits of N0X area codes. 405/918 Oklahoma, 1953 915/817 Texas, 1953 (817 also took part of 214) 218/612/507 Minnesota, 1954 Before this split: 218 was shown as extending down the entire western boundary of Minnesota (along the North & South Dakota borders) to the Iowa border; 612 was also shown extending down to Iowa; 507 did not exist. Apparently, 507 took parts of 218 and 612, and 612 took part of 218. (Starting 1954, new N0X codes began to be assigned in splits of both N0X and N1X area codes.) 315/607 New York, 1954 (607 also took part of 716 at this time or later?) 901/615 Tennessee, 1954 404/912 Georgia, 1954 December 1991 Greater Atlanta call guide, in discussing 404/706 split, said "It's been 38 years since Georgia added an Area Code." 704/919 North Carolina, 1954 402/308 Nebraska, 1954 502/606 Kentucky, 1954 902/506 Canadian maritime provinces, 1955 New Brunswick and Newfoundland/Labrador switched to 506; Nova Scotia and Prince Edward Island stayed in 902. 414/715/608 Wisconsin, 1955 (new area code 608 took parts of 414 and 715) 504/318 Louisiana, 1957 318, used earlier for San Francisco, had been reclaimed by this time. 206/509 Washington state, 1957 1957 marked the beginning of the use of N09 area codes. 613/705 Ontario, 1957 (705 also took part of 519) 213/805 California, 1957 (805 also took parts of 415 and 916) 514/819 Quebec, 1957 (819 also took part of 418) 217/815/309 Illinois, 1957 (new area code 309 took parts of 217 and 815) 915/806 Texas, 1957 (806 also took part of 817) (808 in Hawaii and 907 in Alaska were implemented in 1957.) 201/609 New Jersey, 1958 (New York Times, page B4, 27 April 1989) 916/209 California, 1958 (809 in the Caribbean area was implemented in 1958.) 415/408/707 California, 1959 (new area codes 408 and 707 formed from 415) (In or about 1960, several area code boundaries were realigned. At this or some other time, area code 914 in New York expanded by taking southern part of 518.) 616/906 Michigan, 1961 506/709 New Brunswick and Newfoundland/Labrador, 1962 Newfoundland/Labrador switched to 709; New Brunswick stayed in 506. 705/807 Ontario, 1962 305/904 Florida, July 1965 703/804 Virginia, 24 June 1973 at 2:01 AM (In or after 1975, did a few prefixes, including 394 Canandaigua, move from 315 to 716 in New York? Another one might have been 657 Holcomb.) 714/619 California, Nov 1982 713/409 Texas, Mar 1983 (full cutover 90 days later) 213/818 California, Jan 1984 212/718 New York, 2 Sept 1984 (full cutover 31 Dec 1984) Brooklyn, Queens, Staten Island became 718; Manhattan & Bronx stayed in 212; Bronx switched from 212 to 718, 1 July 1992 (full cutover 15 May 1993; but until then, calls from Bronx to Brooklyn/ Queens/Staten Island still had to be dialed 1+718+7D, and effective 25 Sept 1993 had to be dialed 7D) 303/719 Colorado, 5 Mar 1988 305/407 Florida, 16 Apr 1988 617/508 Massachusetts, 16 July 1988 312/708 Illinois, Nov 1989 (full cutover 9 Feb 1990) 202 District of Columbia & vicinity, 1 Oct 1990 This was like a split despite no new area code. 202 area code, previously useable for all but the outermost Maryland and Virginia suburbs, was restricted to DC proper, with 301 or 703, as the case may be, necessary for suburbs. As a result, government offices (by then including the Pentagon) using zipcodes starting with 200,202,203,204,205 and located in Md. or Va. could no longer be listed in area 202. Prefixes in the Pentagon, which is in Virginia, were previously in area 202 (not 703), and moved to area 703 in 1990 because of local calls across area code border changing from 7D to NPA+7D; 202- 694 had to be replaced by 703-614 because 703-694 was in use at Stuart. 214/903 Texas, 4 Nov 1990 (full cutover 4 May 1991) 201/908 New Jersey, 1 Jan 1991 (full cutover 8 June 1991) 415/510 California, 2 Sept 1991 (full cutover 27 Jan 1992) 301/410 Maryland, 1 Nov 1991 (full cutover 1 Nov 1992) 213/310 California, 2 Nov 1991 (full cutover 16 May 1992; was to be 2 May 1992, but was postponed indefinitely because of riots just before then) All GTE plus some PacBell went into 310. 212/718/917 New York, 1 Jan 1992 (cellular/pager overlay on 212 and 718) 404/706 Georgia, 3 May 1992 (full cutover 3 Aug 1992) 512/210 Texas, 1 Nov 1992 (full cutover 1 May 1993) 714/909 California, 14 Nov 1992 (full cutover 14 Aug 1993) Riverside and San Bernardino counties went into 909; Orange County remained in 714. 416/905 Ontario, 4 Oct 1993 (full cutover 25 Mar 1994, postponed from 10 Jan 1994) 919/910 North Carolina, 14 Nov 1993 (full cutover 13 Feb 1994) 313/810 Michigan, 1 Dec 1993 (full cutover 10 Aug 1994) 215/610 Pennsylvania, 8 Jan 1994 (full cutover 7 Jan 1995) Because of this split, Denver 267, Adamstown 484, and Terre Hill 445 moved to 717 rather than 610, since their telephone companies serve adjacent areas already in 717; Denver went to 717-336 because of 717-267 being used at Chambersburg. I learned of this change for Denver and Adamstown on 2 September 1993; their dialing instructions are discussed elsewhere in this file. I did not learn of the Terre Hill area code change until 21 September 1994; that change was messy because Terre Hill had to go from 7D long distance within old area 215 to 7D long distance within area 717. 312/708/630 Illinois, 7 Jan 1995 (was cellular/pager overlay on 312 and 708) This was in dispute, and a change was formalized 21 March 1995: 1. 630 would become merely geographical and get western part of 708; this would not happen until 1998. 2. numbers already in 630 would move to geographical areas. 3. northern part of 708 would get a new area code; later announced as 847 (20 Jan 1996, full cutover 20 Apr 1996). 4. 312 in Chicago would no longer be involved. This split of 708 would change the area code of some people who went into permissive mode for 708 only in November 1989. 205/334 Alabama, 15 Jan 1995 (full cutover 13 May 1995) The first NNX area code to be announced, on 22 July 1993. 206/360 Washington state, 15 Jan 1995 (full cutover 20 Aug 1995; originally 9 July 1995, then changed to 21 May 1995, but then extended 90 days by the Washington Utilities and Transportation Commission on 26 Apr 1995, because of problems in reaching the new area code, which is of NNX form) 713/281 Texas, 1 Mar 1995 (cellular/pager overlay, but to get new landlines starting 1 Mar 1996) 305/954 Florida, 1 Mar 1995 (was to be wireless overlay, but did not take place as scheduled, because Florida Public Service Commission ruled that it would be geographical with Broward County to move to 954 and Dade County to stay in 305; decision expected in summer 1995) 602/520 Arizona, 19 Mar 1995 (full cutover 23 July 1995) Announced 29 Nov 1993. 303/970 Colorado, 2 Apr 1995 (full cutover 1 Oct 1995) 813/941 Florida, 28 May 1995 (full cutover 3 Mar 1996) 703/540 Virginia, 15 July 1995 (full cutover 13 Jan 1996, changed from 13 July 1996) 203/860 Connecticut, 28 Aug 1995 (full cutover 6 Oct 1996) 213/310/818/562 California, 2 Sept 1995 (cellular/pager overlay, but later to get new landlines in 310) 615/423 Tennessee, 11 Sept 1995 (full cutover 26 Feb 1996) 249 was "too close to some exchanges in Kingsport" and 931 "could be confused with the 901 area code for Memphis". 904/850 Florida, early fall 1995 Jacksonville, Tallahassee, Pensacola stay in 904; Gainesville, Ocala, Daytona Beach go to 850. Basically, it is a line from Crystal River east to Daytona Beach and south. 809/340/441 Caribbean area (441, for Bermuda, on 1 Oct 1995, with full cutover 30 Sept 1996; 340, for Puerto Rico, has no dates available) 503/541 Oregon, 5 Nov 1995 (full cutover 30 June 1996) 404/770 Georgia, 1 Dec 1995 (geographic split, as decided on in Apr 1995) 803/864 South Carolina, 3 Dec 1995 (full cutover 1 May 1996) Greenville LATA to 864; Charleston, Columbia, Florence stay in 803. 216/330 Ohio, late 1995 or early 1996 214/972 Texas, 1 Feb 1996 (overlay, to get all newly-assigned numbers) 314/573 Missouri, Feb 1996 (split or overlay) 604/250 British Columbia, Oct 1996 (full cutover May 1997) 619/760 California, no date available yet Area codes 706,903,905 had been used, at least in the U.S., for calling parts of Mexico. (These codes were later announced for Georgia, Texas, and Ontario respectively.) In 1980, 903 was reclaimed, replaced by 706 when northwestern Mexico border towns were renumbered to conform with Mexico (+52) 6. On 1 Feb 1991, 706 and 905 were discontinued for calls to Mexico (which was and still is reachable in country code 52).