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 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 331-777
| 8 |
Downers Grove |
IL |
EGVGILIFDS1 |
7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL |
358 |
|
2013-05-15 |
|
| 331-777
| 9 |
Downers Grove |
IL |
CHCGILNEXJX |
318J COMCAST IP PHONE, LLC |
358 |
|
2014-06-20 |
|
| 331-788
| A |
Geneva |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
|
|
| 331-788
| 0 |
Geneva |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2021-07-24 |
|
| 331-788
| 1 |
Geneva |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2021-07-24 |
|
| 331-788
| 5 |
Geneva |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2021-12-25 |
|
| 331-788
| 6 |
Geneva |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-11-26 |
|
| 331-788
| 7 |
Geneva |
IL |
|
224C ONVOY, LLC |
358 |
|
2026-03-26 |
|
| 331-788
| 8 |
Geneva |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
2021-03-26 |
|
| 331-788
| 9 |
Geneva |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-11-26 |
|
| 331-800
| A |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
|
|
| 331-800
| 0 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2017-11-26 |
|
| 331-800
| 1 |
West Chicago |
IL |
BFGVILASG00 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2021-10-04 |
|
| 331-800
| 2 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2023-04-20 |
|
| 331-800
| 3 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2025-01-06 |
|
| 331-800
| 4 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-04-05 |
|
| 331-800
| 5 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-04-05 |
|
| 331-800
| 6 |
West Chicago |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-11-26 |
|
| 331-800
| 7 |
West Chicago |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-11-26 |
|
| 331-800
| 8 |
West Chicago |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2017-11-26 |
|
| 331-800
| 9 |
West Chicago |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2021-10-01 |
|
| 331-801
| A |
Downers Grove |
IL |
OKBRILOADC2 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 331-801
| 0 |
Downers Grove |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2014-09-11 |
|
| 331-801
| 1 |
Downers Grove |
IL |
BFGVILASG00 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2014-09-12 |
|
| 331-801
| 2 |
Downers Grove |
IL |
OKBRILOADC2 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2014-07-07 |
|
| 331-801
| 3 |
Downers Grove |
IL |
OKBRILOADC2 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2014-07-07 |
|
| 331-801
| 4 |
Downers Grove |
IL |
OKBRILOADC2 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2014-07-07 |
|
| 331-801
| 5 |
Downers Grove |
IL |
OKBRILOADC2 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2014-07-07 |
|
| 331-801
| 6 |
Downers Grove |
IL |
OKBRILOADC2 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2014-07-07 |
|
| 331-801
| 7 |
Downers Grove |
IL |
OKBRILOADC2 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2014-07-07 |
|
| 331-801
| 8 |
Downers Grove |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2014-09-14 |
|
| 331-801
| 9 |
Downers Grove |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2015-03-07 |
|
| 331-803
| A |
Lemont |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
|
|
| 331-803
| 0 |
Lemont |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-06-04 |
|
| 331-803
| 1 |
Lemont |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-09-26 |
|
| 331-803
| 2 |
Lemont |
IL |
CHCGILWBXWZ |
829J PAETEC ITEL, LLC |
358 |
|
2013-06-04 |
|
| 331-803
| 3 |
Lemont |
IL |
EGVGILIFDS1 |
7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL |
358 |
|
2013-07-03 |
|
| 331-803
| 4 |
Lemont |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2013-06-01 |
|
| 331-803
| 5 |
Lemont |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2013-06-01 |
|
| 331-803
| 6 |
Lemont |
IL |
OKBRILOADC2 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2013-07-25 |
|
| 331-803
| 7 |
Lemont |
IL |
CHCGILDT8MD |
508J CENTURYLINK COMMUNICATIONS, LLC |
358 |
|
2013-06-28 |
|
| 331-803
| 8 |
Lemont |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-09-26 |
|
| 331-803
| 9 |
Lemont |
IL |
|
515J IP HORIZON LLC |
358 |
|
2016-08-09 |
|
| 331-806
| A |
Wheaton |
IL |
CHCGILNEXJX |
318J COMCAST IP PHONE, LLC |
358 |
|
|
|
| 331-806
| 0 |
Wheaton |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2017-04-28 |
|
| 331-806
| 1 |
Wheaton |
IL |
CHCGILWUX6X |
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2015-07-27 |
|
| 331-806
| 2 |
Wheaton |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2016-03-10 |
|
| 331-806
| 3 |
Wheaton |
IL |
CHCGILNEXJX |
318J COMCAST IP PHONE, LLC |
358 |
|
2015-07-26 |
|
| 331-806
| 4 |
Wheaton |
IL |
LSLEILAADS1 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2016-06-17 |
|
| 331-806
| 5 |
Wheaton |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2016-03-10 |
|
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Last updated: Tue, 31 Mar 2026 13:56:49 UTC
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