2600 Magazine - A quarterly magazine dedicated to hacking/phreaking.
9x Datakit Network - 9x is one of the few groups of the early 90s to survive. Many active and inactive hackers. New releases, x.25 scans, 800 scans, Efnet IRC
alt.ph.uk FAQ - FAQ site for alt.ph.uk giving brief overview on phreaking in the UK
Alt.Phreaking FAQ - FAQ file for the alt.phreaking newsgroup. Covers beginner and advanced topics.
Ameriphreak - Phone system exploits and information from NPAs 812 and 502.
AntiOnline's Phreaking Box Archives - Phreaking box plans - in zipped text format. Rather large archive, but lots of overlapping.
CPU [Headquarters] - Home of phate, a H/P e-magazine.
M4phr1k's Wall of Voodoo - Concentrates on war dialing, but also covers PBX and Voicemail hacking as well as general computer security advisories.
Metro Holographix - Huge archive of up-to-date, categorised UK phreaking information.
Mobile Tricks - Contains codes, tricks, cheats and information on mobile phones. Requires Flash plugin.
National Telco Opposition Party - Resources for phreaks including original boxes.
Nettwerked.net - Based in the 780 area code, contains K-1ine zine, info on the FLEX paging protocol, Elcotel payphones, various original text files and as well as the usual archive.
Newbie Phreak Place - Several AutoCAD diagrams of box plans including the Blue Box, the Dark Box and the Purple Box designed to work mainly in the Caribbean.
North Texas Phone Losers - Site supporting and informing phreaks in North Texas area.
Phone Losers of Chicago - The PLC's homepage.
Phone Phantom's Realm - Phone Phreaking & Hackers paradise. DMS Info, BlackZine, Cellular, Linux, IT Security and more.
Phone Rangers - Phone Rangers phreak site (very user friendly).
Phrack - Phrack is a hacking/phreaking zine that has been around forever. Supporting the scene since 1985, Phrack is one of the most well known h/p zines of all time.
Phreak.BE - The resource site for Belgian and other European phreakers.
Phreaker.org - General phreaking information and current news.
Phreakers Guild - A Canadian site featuring a number of text files, scans and a large phonebook.
Phreaking - Exploiting the UK Phone System - Legendary hacker/phreaker Gandalf's well researched take on UK phreaking
PLA813 - Phone Losers site for NPA 813/727. Lots of good stuff.
PPCHQ - New age phreaking site focusing more on the exploitation of today's technology rather than things of the past. Updated frequently
Reorder Tone - RealAudio files of Bell Telephone pre-recorded messages. Useful for answering machine messages to deter unwanted callers.
The Web Page You Have Reached - Downloadable telephone sounds and recordings in wav format. Large and professional site.
United Phone Losers - Offers a discussion board, e-zine with archived issues, list of resources and site history.