HARBOR SPG prefixes in area code 231
NANPA records 7 assigned NXX blocks to rate center HARBOR SPG 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. 6 holders hold those blocks, the largest being MICHIGAN BELL TEL CO (2), CENTURYLINK COMMUNICATIONS, LLC (1), TELEPORT COMMUNICATIONS AMERICA, LLC - MI (1). The earliest assignment on record here is 2010-10-11 and the most recent 2023-07-14. 5 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 |
|---|---|---|---|---|
| 231-221 | Lumen CENTURYLINK COMMUNICATIONS, LLC | 2015-06-01 | yes | yes |
| 231-242 | AT&T MICHIGAN BELL TEL CO | – | yes | yes |
| 231-324 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 2021-05-25 | yes | yes |
| 231-412 | Bandwidth BANDWIDTH.COM CLEC, LLC - MI | 2010-10-11 | yes | yes |
| 231-438 | Onvoy ONVOY, LLCV - MI | 2023-07-14 | yes | yes |
| 231-526 | AT&T MICHIGAN BELL TEL CO | – | no | yes |
| 231-596 | Spok SPOK, INC. | – | 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 |
|---|---|---|---|
| MICHIGAN BELL TEL CO | AT&T | 2 | 28.6% |
| CENTURYLINK COMMUNICATIONS, LLC | Lumen | 1 | 14.3% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MI | AT&T | 1 | 14.3% |
| BANDWIDTH.COM CLEC, LLC - MI | Bandwidth | 1 | 14.3% |
| ONVOY, LLCV - MI | Onvoy | 1 | 14.3% |
| SPOK, INC. | Spok | 1 | 14.3% |
Frequently asked
Which prefixes belong to HARBOR SPG in area code 231?
7 blocks: 221, 242, 324, 412, 438, 526, 596. The table above gives the holder of each.
Which carriers have numbers in HARBOR SPG?
MICHIGAN BELL TEL CO (2 blocks), CENTURYLINK COMMUNICATIONS, LLC (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - MI (1 block), BANDWIDTH.COM CLEC, LLC - MI (1 block), ONVOY, LLCV - MI (1 block), SPOK, 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 HARBOR SPG 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.