Local Calling Guide
Area code/prefix search
NPA: 331
[Rate centres in NPA 331]
[Dial plan for NPA 331]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 331-808
| 6 |
Plano |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2021-02-12 |
|
| 331-808
| 7 |
Plano |
IL |
CHCGIL24XMD |
495J STRATUS NETWORKS |
358 |
|
2020-09-26 |
|
| 331-808
| 8 |
Plano |
IL |
CHCGILWUJMD |
073H TELNYX LLC |
358 |
|
2018-06-28 |
|
| 331-808
| 9 |
Plano |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2016-11-19 |
|
| 331-814
| A |
Naperville |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 331-814
| 0 |
Naperville |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2015-11-13 |
|
| 331-814
| 1 |
Naperville |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2017-10-08 |
|
| 331-814
| 2 |
Naperville |
IL |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2015-08-24 |
|
| 331-814
| 3 |
Naperville |
IL |
CHCGILNEXJX |
318J COMCAST IP PHONE, LLC |
358 |
|
2015-10-11 |
|
| 331-814
| 4 |
Naperville |
IL |
CHCGILWBXWZ |
829J PAETEC ITEL, LLC |
358 |
|
2015-11-13 |
|
| 331-814
| 5 |
Naperville |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-23 |
|
| 331-814
| 6 |
Naperville |
IL |
SCBGILRRGT1 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2016-07-25 |
|
| 331-814
| 7 |
Naperville |
IL |
SCBGILRRGT1 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2016-07-25 |
|
| 331-814
| 8 |
Naperville |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2017-10-08 |
|
| 331-814
| 9 |
Naperville |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-23 |
|
| 331-825
| A |
Geneva |
IL |
|
972C DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL |
358 |
|
|
|
| 331-826
| A |
Elmhurst |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 331-826
| 0 |
Elmhurst |
IL |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2009-06-30 |
|
| 331-826
| 1 |
Elmhurst |
IL |
CHCGILWBXWZ |
829J PAETEC ITEL, LLC |
358 |
|
2009-11-02 |
|
| 331-826
| 2 |
Elmhurst |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2010-09-07 |
|
| 331-826
| 3 |
Elmhurst |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2010-09-07 |
|
| 331-826
| 4 |
Elmhurst |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2010-09-20 |
|
| 331-826
| 8 |
Elmhurst |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-02-25 |
|
| 331-826
| 9 |
Elmhurst |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2009-01-22 |
|
| 331-837
| A |
West Chicago |
IL |
CHCGILWUTMD |
516J TON80 COMMUNICATIONS, LLC |
358 |
|
|
|
| 331-837
| 0 |
West Chicago |
IL |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2022-08-19 |
|
| 331-837
| 1 |
West Chicago |
IL |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2022-08-19 |
|
| 331-837
| 4 |
West Chicago |
IL |
CHCGILWUTMD |
516J TON80 COMMUNICATIONS, LLC |
358 |
|
2022-03-10 |
|
| 331-837
| 5 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2025-04-06 |
|
| 331-837
| 6 |
West Chicago |
IL |
CHCGILWUVMD |
321J HD CARRIER LLC |
358 |
|
2025-10-10 |
|
| 331-837
| 7 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-03-01 |
|
| 331-837
| 8 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2023-07-22 |
|
| 331-837
| 9 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-03-01 |
|
| 331-850
| A |
Big Rock |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
|
|
| 331-850
| 1 |
Big Rock |
IL |
CHCGILWUKMD |
939H COMMIO, LLC |
358 |
|
2022-02-24 |
|
| 331-850
| 3 |
Big Rock |
IL |
CHCGILNEXJX |
318J COMCAST IP PHONE, LLC |
358 |
|
2024-04-18 |
|
| 331-850
| 5 |
Big Rock |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2021-08-09 |
|
| 331-850
| 7 |
Big Rock |
IL |
|
824J OPENTACT INC. |
358 |
|
2026-10-23 |
|
| 331-850
| 8 |
Big Rock |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-06-27 |
|
| 331-850
| 9 |
Big Rock |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2021-10-01 |
|
| 331-866
| A |
Wheaton |
IL |
CHCGILWUTMD |
516J TON80 COMMUNICATIONS, LLC |
358 |
|
|
|
| 331-866
| 0 |
Wheaton |
IL |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2022-11-17 |
|
| 331-866
| 1 |
Wheaton |
IL |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2022-11-17 |
|
| 331-866
| 2 |
Wheaton |
IL |
CHCGILWUTMD |
516J TON80 COMMUNICATIONS, LLC |
358 |
|
2022-03-15 |
|
| 331-866
| 3 |
Wheaton |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-12-12 |
|
| 331-866
| 4 |
Wheaton |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-12-12 |
|
| 331-866
| 5 |
Wheaton |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-12-12 |
|
| 331-866
| 6 |
Wheaton |
IL |
CHCGILWUXMD |
490J BOOST SUBSCRIBERCO L.L.C. |
358 |
|
2026-04-21 |
|
| 331-866
| 7 |
Wheaton |
IL |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2022-11-17 |
|
| 331-866
| 8 |
Wheaton |
IL |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2022-11-17 |
|
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Last updated: Sat, 10 Oct 2026 15:24:20 UTC
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