MASON prefixes in area code 517
NANPA records 11 assigned NXX blocks to rate center MASON in area code 517, 1.8% of the 616 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. 8 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (3), MICHIGAN BELL TEL CO (2), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (1). The earliest assignment on record here is 2002-01-21 and the most recent 2024-02-21. 8 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 283, 304, 325, 513 – 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 |
|---|---|---|---|---|
| 517-244 | AT&T MICHIGAN BELL TEL CO | – | yes | yes |
| 517-362 | T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2024-02-21 | yes | yes |
| 517-525 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | – | no | yes |
| 517-604 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 2002-08-19 | yes | yes |
| 517-676 | AT&T MICHIGAN BELL TEL CO | – | no | yes |
| 517-722 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 2017-10-24 | yes | yes |
| 517-833 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MI | 2004-10-20 | yes | yes |
| 517-883 | FIRST COMMUNICATIONS, LLC | 2008-02-04 | yes | yes |
| 517-928 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 2019-04-22 | yes | yes |
| 517-969 | Windstream PAETEC ITEL, LLC | 2006-01-12 | yes | yes |
| 517-978 | ACD TELECOM, INC. - MI | 2002-01-21 | 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 |
|---|---|---|---|
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | Verizon | 3 | 27.3% |
| MICHIGAN BELL TEL CO | AT&T | 2 | 18.2% |
| OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | T-Mobile | 1 | 9.1% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | Verizon | 1 | 9.1% |
| LEVEL 3 COMMUNICATIONS, LLC - MI | Lumen | 1 | 9.1% |
| FIRST COMMUNICATIONS, LLC | – | 1 | 9.1% |
| PAETEC ITEL, LLC | Windstream | 1 | 9.1% |
| ACD TELECOM, INC. - MI | – | 1 | 9.1% |
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 MASON in area code 517?
11 blocks: 244, 362, 525, 604, 676, 722, 833, 883, 928, 969, 978. The table above gives the holder of each.
Which carriers have numbers in MASON?
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (3 blocks), MICHIGAN BELL TEL CO (2 blocks), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI (1 block), LEVEL 3 COMMUNICATIONS, LLC - MI (1 block), FIRST COMMUNICATIONS, 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 MASON 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.