PLAINFIELD prefixes in area code 317
NANPA records 14 assigned NXX blocks to rate center PLAINFIELD in area code 317, 1.8% of the 786 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. 7 holders hold those blocks, the largest being INDIANA BELL TEL CO INC (5), PAETEC ITEL, LLC (3), TELEPORT COMMUNICATIONS AMERICA, LLC - IN (2). The earliest assignment on record here is 2001-04-03 and the most recent 2026-05-07. 10 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 319, 463, 603, 715 – 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 |
|---|---|---|---|---|
| 317-203 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 317-204 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IN | – | yes | yes |
| 317-268 | Windstream PAETEC ITEL, LLC | 2001-04-03 | yes | yes |
| 317-272 | AT&T INDIANA BELL TEL CO INC | – | no | yes |
| 317-279 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 317-303 | Onvoy ONVOY, LLC - IN | 2026-05-07 | yes | yes |
| 317-406 | AT&T INDIANA BELL TEL CO INC | 2005-11-22 | yes | yes |
| 317-561 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IN | 2001-06-15 | yes | yes |
| 317-707 | Lumen LEVEL 3 TELECOM OF INDIANA, LP - IN | – | yes | yes |
| 317-742 | AT&T AT&T ENTERPRISES, LLC | 2006-01-12 | yes | yes |
| 317-754 | Lumen LEVEL 3 COMMUNICATIONS, LLC - IN | – | yes | yes |
| 317-837 | AT&T INDIANA BELL TEL CO INC | – | no | yes |
| 317-838 | AT&T INDIANA BELL TEL CO INC | – | no | yes |
| 317-839 | AT&T INDIANA BELL TEL CO 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 |
|---|---|---|---|
| INDIANA BELL TEL CO INC | AT&T | 5 | 35.7% |
| PAETEC ITEL, LLC | Windstream | 3 | 21.4% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IN | AT&T | 2 | 14.3% |
| ONVOY, LLC - IN | Onvoy | 1 | 7.1% |
| LEVEL 3 TELECOM OF INDIANA, LP - IN | Lumen | 1 | 7.1% |
| AT&T ENTERPRISES, LLC | AT&T | 1 | 7.1% |
| LEVEL 3 COMMUNICATIONS, LLC - IN | Lumen | 1 | 7.1% |
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 PLAINFIELD in area code 317?
14 blocks: 203, 204, 268, 272, 279, 303, 406, 561, 707, 742, 754, 837 and 2 more, all listed in the table above.
Which carriers have numbers in PLAINFIELD?
INDIANA BELL TEL CO INC (5 blocks), PAETEC ITEL, LLC (3 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - IN (2 blocks), ONVOY, LLC - IN (1 block), LEVEL 3 TELECOM OF INDIANA, LP - IN (1 block), AT&T ENTERPRISES, 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 PLAINFIELD 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.