LAKE ANN prefixes in area code 231
NANPA records 4 assigned NXX blocks to rate center LAKE ANN in area code 231, 0.7% 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 NEW CINGULAR WIRELESS PCS, LLC - IL (2), INTERACTIVE SERVICES NETWORK, INC. (1), BRIGHTSPEED OF MICHIGAN, LLC (1). The earliest assignment on record here is 2002-08-30 and the most recent 2025-05-22. 2 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 |
|---|---|---|---|---|
| 231-240 | INTERACTIVE SERVICES NETWORK, INC. | 2004-03-24 | no | yes |
| 231-275 | Brightspeed BRIGHTSPEED OF MICHIGAN, LLC | – | no | yes |
| 231-341 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2025-05-22 | yes | yes |
| 231-640 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2002-08-30 | 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 |
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 2 | 50% |
| INTERACTIVE SERVICES NETWORK, INC. | – | 1 | 25% |
| BRIGHTSPEED OF MICHIGAN, LLC | Brightspeed | 1 | 25% |
Frequently asked
Which prefixes belong to LAKE ANN in area code 231?
4 blocks: 240, 275, 341, 640. The table above gives the holder of each.
Which carriers have numbers in LAKE ANN?
NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), INTERACTIVE SERVICES NETWORK, INC. (1 block), BRIGHTSPEED OF MICHIGAN, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is LAKE ANN 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.