NPA NXX City Usage Company Name NXX Introduced Date 415 200 San Francisco Landline O1 Communications, Inc. ‑ Ca 01/25/1998 415 200 San Francisco Landline O1 Communications, Inc. ‑ Ca 01/25/1998 415 200 San Francisco Landline O1 Communications, Inc. ‑ Ca 01/25/1998
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