Bertram, TX — rate center
In NANP numbering, Bertram, Texas is a rate center — the anchor point for local numbers. It is reached through 512, 737 (multiple area codes serve it).
The rate center currently carries 7 working prefixes, held by 5 different carriers. Pooling applies to 7 of them — individual thousands-blocks may belong to different companies.
Routing-wise it sits in LATA 558.
Because 512, 737 all serve this territory, two Bertram numbers can look completely different while being neighbors — check the prefix, not just the area code.
A Bertram prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.
Prefixes anchored to Bertram
| Prefix | Code holder | Pooled |
|---|---|---|
| 512-277 | TELNYX LLC | Yes |
| 512-355 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | Yes |
| 512-572 | ONVOY, LLC - TX | Yes |
FAQ
What area code is Bertram, TX?
Bertram is served by 2 area codes — 512, 737 — which overlay the same territory.
How many prefixes does Bertram have?
7 active NXX prefixes are anchored to this rate center in NANPA records, held by 5 carriers.
Is a call from a Bertram prefix really from Bertram?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.