toll free ANAC numbers - what is the number of the phone you are calling from... EDIT 1-29-10

if you need to know the number of the telephone that you are calling from... perhaps you are trying to see if that payphone accepts incoming calls, or you forgot your cell phone or house phone number, because there are so many numbers to remember now-a-days (i know there are at least 5 numbers that can be used to reach me - 2 cells, magicjack, google voice, and optimum voice) you just need to dial an ANAC number to read back the ANI of your number...

1-866-MY-ANI-IS [EDIT no longer works]

1-800-444-4444

are the ones I use most often... there are plenty of others....

EDIT - 1-29-10
here are a bunch more...

888-MCI-LOCAL - 888-624-5622
866MYANIIS- 8666926447
800-235-8378 - PANTLINE?
800-950-9999 - MCI
800-314-4258 - MCI
800-444-0800 - MCI
800-444-3333 - MCI
800-444-4444 - MCI
888-776-5733 - PANTLINE?
800-235-8378 - PANTLINE?
800-660-2626 - ATT
416-981-0001 - TEST LINE (CLAIMS CALL BACK DID NOT GET ONE) not toll free
800-221-1950 - PANTLINE?
800-263-8071 - PANTLINE?
800-314-4258 - MCI
800-333-3232 - MCI
800-420-0040 - PANTLINE
800-437-7950 - MCI ANI VERIFICATION
800-444-2222 - MCI
800-444-5555 - MCI
800-492-0295 - PANTLINE?
800-555-1221 - MCI
800-584-9139 - PANTLINE
800-584-9149 - PANTLINE
800-584-9159 - PANTLINE
800-797-6088 - PANTLINE
800-803-6528 - PANTLINE
800-803-6594 - PANTLINE
800-888-7737 - MCI
800-950-5555 - MCI (DIFFERENT)
800-950-9999 - MCI

EDIT-
608-884-1206 (not toll free)
804-222-1111 (reads back caller ID info, not toll free) much more cool stuff @ this number check http://testcall.com for more info on this number.