NANP to E.164-style output
E.164 Phone Number Converter for US & Canada (+1)
Convert common North American punctuation and a leading 1 into consistent +1 output. This tool supports the North American Numbering Plan only; it is not a general international parser.
- Outputs values such as +14155550199
- Accepts 10 digits or 11 digits beginning with 1
- Separates common extension markers before formatting
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Format a pasted list
Practical workflow
Use the formatter without losing your source data
- 1
Supply a supported NANP number
Paste a 10-digit number or an 11-digit number beginning with 1. Spaces, dots, dashes, and parentheses are removed during formatting.
- 2
Select E.164 output
The formatter normalizes the national number to ten digits and emits a plus sign, country code 1, and the ten-digit national number.
- 3
Verify destination requirements
Confirm the importing API, CRM, or calling platform accepts +1 E.164-style strings and determine how it expects extensions to be stored.
What E.164 means in this tool
E.164 is the ITU-T international public telecommunication numbering plan. A globally presented number commonly begins with a plus sign followed by a country code and the remaining national number. The complete international number is limited to 15 digits.
PrimeDialPRO implements a deliberately narrow slice: country code 1 for supported US and Canada NANP inputs. It does not infer other country codes, interpret international trunk prefixes, or validate numbering rules for other countries.
Formatting is not phone-number verification
A value can have the expected length and still be unassigned, disconnected, mistyped, or unsuitable for a particular channel. PrimeDialPRO does not contact a carrier or subscriber, and it does not identify mobile, landline, or VoIP service.
Use the result as consistent storage or interchange formatting. Use an appropriate carrier or verification service when your workflow requires assignment, line type, consent, or reachability checks.
- Structure check: supported here.
- Carrier and line type: not checked.
- Reachability and consent: not checked.
How extensions are handled
Common markers such as ext, extension, x, and # are separated before the base number is formatted. The extension is not appended to the E.164 value because extension storage is application-specific. Keep it in a separate destination field whenever possible.
Input and output examples
(415) 555-0199+1415555019910-digit NANP input1 212 555 0125+12125550125Leading country code normalized+44 20 7946 0958ReviewInternational input is not supportedFrequently asked questions
Does PrimeDialPRO support every E.164 country code?
No. It currently supports 10-digit NANP numbers and 11-digit inputs beginning with country code 1 for the US and Canada.
Is an E.164-formatted number guaranteed to be valid?
No. Correct-looking structure does not establish assignment, carrier, line type, reachability, or consent.
Should an extension be part of the E.164 number?
PrimeDialPRO separates extensions and leaves them outside the formatted base number. Store the extension in a separate field according to the destination system’s documentation.