NANPA Activities
NANPA Activities
NANPA Activities
NANPA Activities
NANPA Activities
NANPA Activities
NANPA Activities

Numbering Resources

555 Line Numbers

555 numbers are used to reach a wide variety of information services.

555 numbers are in the format 555-XXXX. The line number (XXXX) indicates the particular information service. 555 numbers are assigned according to guidelines developed by the ATIS-sponsored Industry Numbering Committee.

The assignment guidelines do not address the implementation of or dialing arrangements for 555 line numbers. Potential 555 line numbers applicants should address these issues with local service providers.

555 numbers may be assigned for either national or local use. A national assignment requires that the 555 number be implemented in at least 30% of all NPAs or states or provinces in the NANP Area. A local assignment is made for implementation in certain NPAs specified at assignment time.

View current 555 line number assignments

Request 555 line number assignments.

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