Local Calling Guide
Area code/prefix search
NPA: 628
[Rate centres in NPA 628]
[Dial plan for NPA 628]
NXX: 291
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 628-291
| A |
Mill Valley |
CA |
SNFCCASYOMD |
597F VOIP INNOVATIONS, LLC |
722 |
|
|
|
| 628-291
| 0 |
Mill Valley |
CA |
SNFCCA21XUY |
981E BANDWIDTH.COM CLEC, LLC - CA |
722 |
|
2024-11-10 |
|
| 628-291
| 1 |
Mill Valley |
CA |
SNFCCA21XUY |
981E BANDWIDTH.COM CLEC, LLC - CA |
722 |
|
2024-11-10 |
|
| 628-291
| 2 |
Mill Valley |
CA |
SNFCCA21XNZ |
624H ONVOY SPECTRUM, LLC |
722 |
|
2025-01-30 |
|
| 628-291
| 3 |
Mill Valley |
CA |
CNCRCADOCM5 |
6010 NEW CINGULAR WIRELESS PCS, LLC |
722 |
|
2025-06-14 |
|
| 628-291
| 4 |
Mill Valley |
CA |
SNFCCASYOMD |
597F VOIP INNOVATIONS, LLC |
722 |
|
2026-06-14 |
|
| 628-291
| 5 |
Mill Valley |
CA |
|
649C ONVOY, LLC - CA |
722 |
|
2026-08-01 |
|
| 628-291
| 6 |
Mill Valley |
CA |
|
649C ONVOY, LLC - CA |
722 |
|
2026-08-01 |
|
| 628-291
| 8 |
Mill Valley |
CA |
SNJUCACLDS1 |
373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA |
722 |
|
2024-11-19 |
|
| 628-291
| 9 |
Mill Valley |
CA |
CNCRCADOCM5 |
6010 NEW CINGULAR WIRELESS PCS, LLC |
722 |
|
2023-09-18 |
|
Last updated: Thu, 16 Jul 2026 02:21:55 UTC
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