By simply calling every telephone number in an exchange, you could find some of the most amazing things (as well as hundreds of angry citizens you'd woken up in the middle of the night). Test numbers, numbers that told you where you were calling from, odd recordings, you name it. An easy way to make a name for yourself was to simply choose a given telephone exchange, dial everything in it, and casually report all the great stuff you'd found.
If time-consuming scanning wasn't your bag, you could just do a little side research in government and public documents, and find out interesting phone numbers as well.
Finally, you'll find some files that dealt specifically with the telephone numbers themseves; how the Phone Company assigned them, what they consisted of, what interesting issues were being raised by how the telephone system itself was arranged.
| Filename | Size | Description of the Textfile| 0800.txt | 5874 | Collection of Unusual 800 Numbers, by Emjay (May 24, 1988)
| 0800numb.txt | 47931 | Collection of 0800 Numbers by Cryton/Denzil and Defekt
| 10xxx.phk | 6614 | Collection of Equal Access Carriers, by Kingpin
| 10xxx.txt | 6019 | 10XXX Equal Access Listing
| 1800numb.txt | 5238 | Toll Free Numbers, by Redbook
| 227scan.txt | 16240 | Scan of the 227 Exchange in Downtown Boston, MA (December 25, 1990) by Meem/Rogue
| 266scan.txt | 2000 | Scan of the 266 Exchange, by Mudge and Wintermute (Boston Numbers)
| 312_976 | 2816 | Listing of Chicago "976" Numbers, January 1987 by Leo Langevin
| 313exchg.dta | 28741 | 313 Exchange Information
| 313prefx.txt | 13064 | Detroit Area Phone Prefixes
| 330scan.phk | 2254 | Sydney 02-330-xxxx scan list
| 439scan.txt | 46469 | The Wardial Project, November 11, 1990, by Rogue and Meem (Dwontown and Midtown Boston)
| 800-bbs.txt | 11254 | Toll_Free BBS Numbers around the Country
| 800carie.ass | 44614 | 800 Service Number Allocation and Company Directory, from the Archives of Brian Oblivion
| 800com.txt | 1232 | 800 AC Computer Numbers
| 800ext.txt | 689 | Small List of 1-800 Extenders and Code Lengths
| 800help.phk | 1995 | Warewolf's collection of 1-800 WATTS Lines
| 800line.phk | 3085 | 800 Line List
| 800m.phk | 2996 | 800 Tollfree Numbers, by TAQA Vigilante
| 800mhz.phk | 7044 | 800 - 1300 MHz Listening Guide
| 800npa.txt | 45688 | List of NPA Numbers Assigned, from Bill Hutting (March 1991)
| 800nums.txt | 1845 | Some Public Access 800 Numbers
| 800numss.txt | 5924 | A List of Toll Free Numbers, by Redbook
| 800pre.txt | 4518 | 800 Prefixes
| 800prefx.con | 5218 | 800 Prefizes, by the Researcher
| 800scan.txt | 5642 | "Recent" Breakdown of the 1-800-3XX Exchange
| 900_serv.pro | 11975 | Current 900 Prefix Assignments, from Patrick Townson and John R. Levine (October 1994)
| 950slist.txt | 1029 | List of 950 Extender Numbers
| 950tones.lst | 3112 | List of the 950 Exchange in the 405 Area Code by Phreaking Of the Industry (February 2, 1995)
| 976dir.txt | 1689 | A Small 976 Exchange List (With menu/selection of a phreak section)
| 976ex.txt | 1643 | A 976 Exchange Directory
| 99scan.phk | 4914 | Exchange scanning in the 99XX portion of an exchange
| 99xx.phk | 747 | Jason's scan of the 914-277-99XX Exchange
| 99xxscan.txt | 3229 | 99xx Telephone Scan, by Tom Brown (June 2, 1984)
| 99xxscon.txt | 2048 | 99XX Scanning: A Primer
| agreatex.txt | 2652 | 1-800 Extender PBX List Version 2.0 by X-Man
| allphone.phk | 63188 | An Extremely LArge List of Mobile Telephone Frequencies
| area204doc.phk | 15089 | 1991 Breakdown of the 204 Area Code
| area306doc.phk | 19466 | 1991 Breakdown of the 306 Area Code
| area403doc.phk | 23328 | 1991 Breakdown of the 403 Area Code
| area416doc.phk | 16981 | 1991 Breakdown of the 416 Area Code
| area418doc.phk | 14657 | 1991 Breakdown of the 418 Area Code
| area506doc.phk | 10167 | 1991 Breakdown of the 506 Area Code
| area514doc.phk | 11753 | 1991 Breakdown of the 514 Area Code
| area519doc.phk | 14224 | 1991 Breakdown of the 519 Area Code
| area604doc.phk | 19070 | 1991 Breakdown of the 604 Area Code
| area613doc.phk | 12204 | 1991 Breakdown of the 613 Area Code
| area705doc.phk | 13313 | 1991 Breakdown of the 705 Area Code
| area709doc.phk | 12922 | 1991 Breakdown of the 709 Area Code
| area800doc.phk | 16583 | 1991 Breakdown of the 800 Area Code
| area807doc.phk | 10245 | 1991 Breakdown of the 807 Area Code
| area809doc.phk | 36144 | 1991 Breakdown of the 809 Area Code
| area819doc.phk | 15451 | 1991 Breakdown of the 819 Area Code
| area902doc.phk | 12916 | 1991 Breakdown of the 902 Area Code
| areacode.con | 6000 | Bell System Area Codes in Numeric Order for the USA and Parts of Canada
| areacode.phk | 5141 | Now Completely-Out-Of-Date Area Code Listing
| areacode.txt | 3038 | Area Code and Time Code Listing by U.I. Communications (January 13, 1988)
| areacodelst.phk | 1358416 | Completely out of control Area Code/Exchange List (1.3 megs)
| attrout.phk | 9020 | AT&T/BOC Routing Code List
| baiq.phk | 5568 | Revised Listing of Class Codes
| blackpgs.txt | 5120 | The Federal Black Pages, by The Line Breaker
| bob-4.man | 72932 | Area Code List by Net Runner
| book_1.txt | 10379 | The Tower of Revenge's Famous Person Number List
| book_2.txt | 11194 | The Tower of Revenger's Famous Number List (December 18, 1989)
| bt-codes | 11353 | Exchange Information about British Telecom Exchanges, Who Mans What, etc.
| canadad.txt | 1371 | Collection of Canadian Area Codes from P-80
| carriers001.phk | 3500 | 800 Carrier List #1, 1989
| cicslist.txt | 6089 | Alphabetical Listing of ICS and Carrier Identification Codes (CICS) from a Bellcore Memo by Bioc Agent 003, TUC, and Agrajag (November 1984)
| cicslst.phk | 6126 | Alphabetical Listing of ICS and Carrier Identification Codes (CICS)
| cna.txt | 4224 | Outdated List of CNA Numbers
| cna1.txt | 5504 | Collection of CNA Numbers
| cna1doc.phk | 1095 | CNA Numbers of 1988
| cna2doc.phk | 4231 | More CNS Numbers
| cna3doc.phk | 4127 | Another complete 1988 CNA Listing
| cna985.txt | 2048 | Customer Names and Addresses by Jack Flak (September 1985)
| cnalist.txt | 5120 | Nationwide CN/A Listing ftom Cyprian Southack of The lost City of Atlantis
| cnu-020c.txt | 80576 | Phone Scan of Germany Modem Numbers
| codesdoc.phk | 14497 | North American Area Codes (20 December 1991)
| cotrycd.txt | 5211 | AT&T International Dialing: Country Codes as of 2-17-85 by Lock Lifter
| country.phk | 5605 | Country and City Codes, typed and Uploaded by Lex Luthor
| ctrycodedoc.phk | 12996 | Country Codes (20 December 1991)
| db001.txt | 1867 | Unlisted Telephone Numbers from the Wanderjahr
| dial10.phk | 5888 | |