TUSTIN prefixes in area code 231
NANPA records 3 assigned NXX blocks to rate center TUSTIN in area code 231, 0.5% of the 572 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 3 holders hold those blocks, the largest being BANDWIDTH.COM CLEC, LLC - MI (1), ONVOY, LLCV - MI (1), MICHIGAN BELL TEL CO (1). The earliest assignment on record here is 2014-10-06 and the most recent 2021-09-03. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 231-371 | Bandwidth BANDWIDTH.COM CLEC, LLC - MI | 2021-09-03 | yes | yes |
| 231-819 | Onvoy ONVOY, LLCV - MI | 2014-10-06 | yes | yes |
| 231-829 | AT&T MICHIGAN BELL TEL CO | – | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| BANDWIDTH.COM CLEC, LLC - MI | Bandwidth | 1 | 33.3% |
| ONVOY, LLCV - MI | Onvoy | 1 | 33.3% |
| MICHIGAN BELL TEL CO | AT&T | 1 | 33.3% |
Frequently asked
Which prefixes belong to TUSTIN in area code 231?
3 blocks: 371, 819, 829. The table above gives the holder of each.
Which carriers have numbers in TUSTIN?
BANDWIDTH.COM CLEC, LLC - MI (1 block), ONVOY, LLCV - MI (1 block), MICHIGAN BELL TEL CO (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is TUSTIN a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.