Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request From: kaplanr@chaos.cs.brandeis.edu (Robert Kaplan) Newsgroups: comp.dcom.telecom Subject: Re: Centrex and 9xxx Numbers Message-ID: <4136@accuvax.nwu.edu> Date: 20 Feb 90 06:50:42 GMT Sender: news@accuvax.nwu.edu Organization: TELECOM Digest Lines: 75 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 10, Issue 116, message 3 of 8 Funny you should ask. Brandeis University uses (617)736-2000 to 736-8999. Both "0" and "9" are used for other purposes from campus phones ("1" is unused for any other purpose, but is presumably available.) Just the other night I tried some random numbers of the form 736-0xxx, 736-1xxx, and 736-9xxx. 0xxx and 1xxx returned "not in service messages," as did 90xx-93xx and 95xx-99xx. (at least the ones I tried). Any number of the form 736-94xx connected me with the Xerox Voice Exchange System, apparently some sort of internal voicemail. Anyone know what that is? Something similar was in use in Rochester NY a few years ago. The University of Rochester used (716)275 2xxx-8xxx. 0xxx, 1xxx, and 9xxx were available to customers in the town of Brighton. About 1982, the university began moving to 5-digit dialing on campus, and the addition of the 277 exchange. That allowed use of [27]5-0xxx, 1xxx, and 9xxx. The non-university customers on those numbers were moved to the 461 exchange; so WWWG radio (275-9212) became 461-9212, for example. Incredibly, at least according to someone I know who had a 275-9xxx number, the change took place with *no notice whatsoever* to the subscriber! BTW, the phone # here for campus police [I just noticed this] is PEnnsylvania 6-5000! :-) A few other examples in NY State are: The Rochester Institute of Technology uses just part of (716) 475; I *think* from 475-2000 to 475-6999 (?). The rest of the exchange is used in the northern part of the town of Henrietta [the part served by the "Rochester" exchange {272, 424, 427 #s} and not the "Henrietta" exchange {334, 359}]. SUNY Brockport uses (716) 395-xxxx; although they do not use all of the numbers possible, there are no other users of that exchange -- other Brockport customers get (716) 637-xxxx. SUNY Geneseo uses (716) 245-xxxx; same situation there -- other Geneseo customers get (716) 243-xxxx. Cornell University uses (315) 787-xxxx for its agricultural experimentation center in Geneva NY; as far as I know there is no one else on 787 but them, although they do not use the whole exchange. Other Geneva customers are 781- and 789-. Cornell also maintains leased lines and allows toll-free calling between the experiment station in Geneva and the main campus in Ithaca. Most other Centrex users in Rochester Telephone land use parts of the following "Rochester" exchanges: 222, 238, 253, 258, 263, 274, 292, 424, 427, 588, 722, 724, 726, 777, 781, 955, and 987. 253, 477, 588, 722, and 781 are exclusively for Eastman Kodak's mammoth phone system, which also uses large chunks of 722, 724, and 726. 777 is at present used only by Roch Tel itself; they just moved their office phone #s there from 955 in 1988. 222 is the high-volume one for the radio stations and such. The 1990 Roch Tel book also lists 255, 429, 957, and 959, which I suspect are Centrex exchanges as well. 428-xxxx is used exclusively by city and county government. Again, they do not use 428-0xxx, 1xxx, or 9xxx. As far as I know, nobody does. One somewhat related question: It seems every year Roch Tel adds at least 5 new exchanges. If NYNEX is doing the same in its (Buffalo LATA) part of 716, how far is 716 from an area code split? And will the Rochester LATA get a NNX NPA? Yecch! I'm getting nostalgic for 716 and it's not even gone yet! There are no N1/0X exchanges in 716 yet, and dialing toll calls within the area code is 1+7 digits. Last time I tried, Roch Tel wouldn't allow 1+716+7 digits. Scott Fybush Disclaimer: This may not even be my own opinion.