NumberResearchRecent prefix assignments
371 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
Most active assignees, last 30 days
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 216-504 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | TERRACE | OH | |
| 216-506 | AMERICAN MESSAGING SERVICES, LLC | 9748 | CLEVELAND | OH | |
| 216-509 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CLEVELAND | OH | |
| 216-510 | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | MONTRSE | OH | |
| 216-511 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH | |
| 216-513 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CLEVELAND | OH | |
| 216-514 | OHIO BELL TEL CO | 9321 | TERRACE | OH | |
| 216-515 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-517 | SPOK, INC. | 6630 | CLEVELAND | OH | |
| 216-518 | OHIO BELL TEL CO | 9321 | MONTRSE | OH | |
| 216-520 | OHIO BELL TEL CO | 9321 | INDEPNDNCE | OH | |
| 216-521 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-522 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-523 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-524 | OHIO BELL TEL CO | 9321 | INDEPNDNCE | OH | |
| 216-527 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CLEVELAND | OH | |
| 216-529 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-531 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-532 | TELNYX LLC | 073H | INDEPNDNCE | OH | |
| 216-533 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CLEVELAND | OH | |
| 216-535 | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CLEVELAND | OH | |
| 216-536 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CLEVELAND | OH | |
| 216-538 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CLEVELAND | OH | |
| 216-539 | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CLEVELAND | OH | |
| 216-541 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-544 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CLEVELAND | OH | |
| 216-545 | OHIO BELL TEL CO | 9321 | TERRACE | OH | |
| 216-548 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CLEVELAND | OH | |
| 216-549 | AMERICAN MESSAGING SERVICES, LLC | 9748 | CLEVELAND | OH | |
| 216-551 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CLEVELAND | OH | |
| 216-552 | SPOK, INC. | 6630 | CLEVELAND | OH | |
| 216-554 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CLEVELAND | OH | |
| 216-555 | MULTIPLE OCN LISTING | MULT | DIR ASST | OH | |
| 216-556 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-557 | SPOK, INC. | 6630 | CLEVELAND | OH | |
| 216-559 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CLEVELAND | OH | |
| 216-561 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-562 | T-MOBILE USA, INC. | 6529 | CLEVELAND | OH | |
| 216-563 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-566 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-567 | OH | ||||
| 216-568 | SPOK, INC. | 6630 | CLEVELAND | OH | |
| 216-570 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CLEVELAND | OH | |
| 216-573 | OHIO BELL TEL CO | 9321 | INDEPNDNCE | OH | |
| 216-574 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-575 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-577 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CLEVELAND | OH | |
| 216-578 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-579 | OHIO BELL TEL CO | 9321 | CLEVELAND | OH | |
| 216-581 | OHIO BELL TEL CO | 9321 | MONTRSE | OH |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.