IOWA prefixes in area code 337
NANPA records 5 assigned NXX blocks to rate center IOWA in area code 337, 0.8% of the 599 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 NEW CINGULAR WIRELESS PCS, LLC - GA (1), METROPCS, INC. (1), VOICESTREAM GSM I, LLC (1). The earliest assignment on record here is 2004-03-16 and the most recent 2023-09-07. 4 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 |
|---|---|---|---|---|
| 337-358 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | 2004-03-16 | yes | yes |
| 337-379 | T-Mobile METROPCS, INC. | 2004-03-19 | yes | yes |
| 337-391 | VOICESTREAM GSM I, LLC | 2004-03-19 | yes | yes |
| 337-582 | Brightspeed BRIGHTSPEED OF LOUISIANA, LLC | – | no | yes |
| 337-610 | COMMIO, LLC | 2023-09-07 | 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 - GA | AT&T | 1 | 20% |
| METROPCS, INC. | T-Mobile | 1 | 20% |
| VOICESTREAM GSM I, LLC | – | 1 | 20% |
| BRIGHTSPEED OF LOUISIANA, LLC | Brightspeed | 1 | 20% |
| COMMIO, LLC | – | 1 | 20% |
Frequently asked
Which prefixes belong to IOWA in area code 337?
5 blocks: 358, 379, 391, 582, 610. The table above gives the holder of each.
Which carriers have numbers in IOWA?
NEW CINGULAR WIRELESS PCS, LLC - GA (1 block), METROPCS, INC. (1 block), VOICESTREAM GSM I, LLC (1 block), BRIGHTSPEED OF LOUISIANA, LLC (1 block), COMMIO, 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 IOWA 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.