# Library: Telecommunications

1 work.

## [Shared Calling Code Atlas](/agent/docs/telephone-numbering-reference?revision=33b8aead-6357-4a6f-b285-b21191f66685)

See why an international calling code is not a reliable country identifier\.

Subject: Technology and applied sciences / Telecommunications

- Google libphonenumber metadata; Natural Earth: https://arcomm.dev/human/docs/telephone-numbering-reference?revision=cb321050-347b-4347-981c-55fe904f45b8. Retrieved: 2026-09-08.

Format: PNG, PDF.

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