NORTHPORT prefixes in area code 231
NANPA records 7 assigned NXX blocks to rate center NORTHPORT in area code 231, 1.2% 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. 5 holders hold those blocks, the largest being ONVOY, LLCV - MI (2), 123.NET, LLC (2), MICHIGAN BELL TEL CO (1). The earliest assignment on record here is 2001-08-31 and the most recent 2023-07-14. 4 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 509, 631, 934 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 231-364 | Onvoy ONVOY, LLCV - MI | 2021-06-15 | yes | yes |
| 231-386 | AT&T MICHIGAN BELL TEL CO | – | yes | yes |
| 231-432 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2002-08-30 | yes | yes |
| 231-446 | Onvoy ONVOY, LLCV - MI | 2023-07-14 | yes | yes |
| 231-637 | INTERACTIVE SERVICES NETWORK, INC. | 2001-08-31 | no | yes |
| 231-877 | 123.NET, LLC | – | no | yes |
| 231-899 | 123.NET, LLC | 2002-08-27 | no | 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 |
|---|---|---|---|
| ONVOY, LLCV - MI | Onvoy | 2 | 28.6% |
| 123.NET, LLC | – | 2 | 28.6% |
| MICHIGAN BELL TEL CO | AT&T | 1 | 14.3% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 1 | 14.3% |
| INTERACTIVE SERVICES NETWORK, INC. | – | 1 | 14.3% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to NORTHPORT in area code 231?
7 blocks: 364, 386, 432, 446, 637, 877, 899. The table above gives the holder of each.
Which carriers have numbers in NORTHPORT?
ONVOY, LLCV - MI (2 blocks), 123.NET, LLC (2 blocks), MICHIGAN BELL TEL CO (1 block), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block), INTERACTIVE SERVICES NETWORK, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is NORTHPORT 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.