Dan_Bloch@transarc.com (11/18/90)
There've been a lot of items recently about area code 714 splitting to 909, and comments about how rapidly Southern California is going through area codes. I've started wondering just what the pattern has been over the last thirty years. Do any of you historians out there have, or know where I could find, a chronological list of area code assignments? (i.e. what the original area codes were, and what year each new one was added?) Or if this doesn't exist, just a list or map of the original NANP would be interesting. Thanks, Dan Bloch dan@transarc.com [Moderator's Note: This is a job for Carl Moore <cmoore@brl.mil>. He has loads of information on this, and perhaps will write an article for the Digest or at the very least send you some information. PAT]
cmoore@brl.mil (VLD/VMB) (11/21/90)
OK, here is what I now have regarding:
1) Use of N0X/N1X prefixes
2) Splits from 1965 to the present (and known future ones)
If you've been reading the Digest, the 714/909 and 301/410 splits have
been posted here in rapid succession. My own office is in
northeastern Maryland near I-95, and I believe it will go into 410.
These areas have N0X/N1X prefixes:
213, California, July 1973 (now 213/818; to become 213/310/818)
(7D on toll calls within it)
212, New York, November 1980 (now 212/718, to become 212/917/718)
(no toll calls within it)
312, Illinois, October 1982 (now 312/708)--but got 1st N0X/N1X spring 1983?
(7D on toll calls within it)
201, New Jersey (to become 201/908) (7D on toll calls within it)
214, Texas (now 214/903) (1+NPA+7D on toll calls within it)
301/202/703, Maryland/DC/Virginia (1987, originally due to DC area growth)
(1+NPA+7D on toll calls within 301 and 703 -- 301 to become 301/410)
415, California, February 1989? (to become 415/510) (7D on toll calls
within it)
404, Georgia, October 1989? (1+NPA+7D on toll calls within it)
919, North Carolina, 1989? (1+NPA+7D on toll calls within it)
416, Ontario, 1990? (1+NPA+7D on toll calls within it as of 3-1-1990)
602, Arizona, 1990? (1+NPA+7D on toll calls within it)
313, Michigan, 1990? (1+NPA+7D on toll calls within it)
512, Texas, 9 September 1990 (1+NPA+7D on toll calls within it)
215, Pennsylvania, 20 May 1991 (7D on toll calls within it)
Area code splits known to me:
305/904 Florida, July 1965
703/804 Virginia, June 1973
714/619 California, November 1982
713/409 Texas, March 1983 (full cutover 90 days later)
213/818 California, January 1984
212/718 New York, September 1984
303/719 Colorado, 5 March 1988
305/407 Florida, 16 April 1988
617/508 Massachusetts, 16 July 1988
312/708 Illinois, November 1989 (full cutover 9 February 1990)
202 District of Columbia and vicinity, 1 October 1990
202 area code had been useable for DC proper AND all but the
outermost points in Maryland and Virginia suburbs, in areas 301
and 703 respectively. 202 was then withdrawn from the suburbs
and restricted to DC proper. This change does not affect the
area code for Maryland zipcodes starting with 206,207,208,209
or for Virginia zipcodes starting with 220,221,222,223; but does
affect government offices (now including the Pentagon) using
zipcodes starting with 200,202,203,204,205 and located in Md.
or Va. Prefixes in the Pentagon, which is in Virginia, had been
in area 202 (not 703), but in 1990 were moved to area 703.
214/903 Texas, 4 November 1990 (full cutover 4 May 1991)
201/908 New Jersey, 1991
415/510 California, 7 October 1991 (full cutover 27 January 1992)
213/310 California, 1 February 1992 (full cutover 1 May 1992)
212/917 New York, 1992 or 1993? (details not yet available)
714/909 California, 1992
301/410 Maryland, 1992