Local Calling Guide
Area code/prefix search
NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]
NXX: 538
NPA-NXX | BLOCK | Rate Centre | Region | Switch | OCN | LATA | LIR | Eff date | Disc date |
---|---|---|---|---|---|---|---|---|---|
443-538 | A | Columbia | MD | BLTMMDCH40Z | 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 238 |
Last updated: Sun, 01 Jun 2025 02:18:11 UTC
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