Local Calling Guide
Area code/prefix search
Mason City, IL
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 217-360
| A |
SPFDILMB0MD |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
374 |
|
|
|
| 217-360
| 0 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
374 |
|
|
|
| 217-360
| 1 |
|
145J TERRA NOVA TELECOM INC. |
374 |
|
2025-12-15 |
|
| 217-360
| 2 |
|
224C ONVOY, LLC |
374 |
|
2020-05-21 |
|
| 217-360
| 3 |
|
224C ONVOY, LLC |
374 |
|
2018-07-30 |
|
| 217-360
| 4 |
|
224C ONVOY, LLC |
374 |
|
2020-05-21 |
|
| 217-360
| 5 |
|
224C ONVOY, LLC |
374 |
|
2020-05-21 |
|
| 217-360
| 6 |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
374 |
|
2016-01-22 |
|
| 217-360
| 7 |
|
224C ONVOY, LLC |
374 |
|
2020-05-21 |
|
| 217-360
| 8 |
|
224C ONVOY, LLC |
374 |
|
2019-04-15 |
|
| 217-360
| 9 |
|
224C ONVOY, LLC |
374 |
|
2019-04-15 |
|
| 217-482
| A |
MSCYILXCDS0 |
1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL |
374 |
|
|
|
| 447-257
| A |
SPFDILES7MD |
224C ONVOY, LLC |
374 |
|
|
|
| 447-257
| 0 |
|
495J STRATUS NETWORKS |
374 |
|
2021-12-13 |
|
| 447-257
| 1 |
|
073H TELNYX LLC |
374 |
|
2023-11-16 |
|
| 447-257
| 2 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
374 |
|
2024-09-01 |
|
| 447-257
| 4 |
|
224C ONVOY, LLC |
374 |
|
2021-06-25 |
|
| 447-257
| 7 |
|
224C ONVOY, LLC |
374 |
|
2021-08-01 |
|
| 447-257
| 8 |
|
624H ONVOY SPECTRUM, LLC |
374 |
|
2024-05-24 |
|
| 447-257
| 9 |
|
490J DISH WIRELESS, LLC |
374 |
|
2023-11-13 |
|
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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