NumberResearchRecent prefix assignments
360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
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 | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2014-04-04 | 863-225 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - FL | 982E | LAKELAND | FL |
| 2014-04-04 | 929-270 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | NWYRCYZN10 | NY |
| 2014-04-04 | 929-281 | 0–9 XXXall 10 · 7 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN04 | NY |
| 2014-04-04 | 929-324 | 0–9 XXXall 10 · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN06 | NY |
| 2014-04-04 | 951-388 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HMLD | CA |
| 2014-04-03 | 210-774 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2014-04-03 | 832-965 | 0–9 XXXall 10 · 5 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | BAMMEL | TX |
| 2014-04-02 | 224-661 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IL | 984E | GLENVIEW | IL |
| 2014-04-02 | 224-662 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IL | 984E | LAKEZURICH | IL |
| 2014-04-02 | 234-770 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | MANCHESTR | OH |
| 2014-04-02 | 336-606 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | SANDYRIDGE | NC |
| 2014-04-02 | 336-915 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | ROXBORO | NC |
| 2014-04-02 | 336-916 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | MADISON | NC |
| 2014-04-02 | 541-371 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | HERMISTON | OR |
| 2014-04-02 | 587-312 | not yet reported which blocks → | Bell West Inc. | 2933 | Lacombe | — |
| 2014-04-02 | 587-342 | not yet reported which blocks → | Bell West Inc. | 2933 | Taber | — |
| 2014-04-02 | 587-344 | not yet reported which blocks → | Bell West Inc. | 2933 | Sylvan Lake | — |
| 2014-04-02 | 720-593 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | DENVER | CO |
| 2014-04-02 | 778-408 | not yet reported which blocks → | Bell West Inc. | 2933 | Westview | — |
| 2014-04-02 | 781-563 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BRYANTVL | MA |
| 2014-04-02 | 919-694 | 0–9 XXXall 10 · 5 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | CARY | NC |
| 2014-04-01 | 407-801 | 0–9 XXXall 10 · 2 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | ORLANDO | FL |
| 2014-04-01 | 480-376 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2014-04-01 | 573-501 | 0–9 XXXall 10 · 6 holders which blocks → | UNITED STATES CELLULAR - MO | 6275 | HANNIBAL | MO |
| 2014-04-01 | 587-307 | not yet reported which blocks → | Bell West Inc. | 2933 | Beaumont | — |
| 2014-04-01 | 587-308 | not yet reported which blocks → | Bell West Inc. | 2933 | Beaverlodge | — |
| 2014-04-01 | 587-309 | not yet reported which blocks → | Bell West Inc. | 2933 | Crossfield | — |
| 2014-04-01 | 587-339 | not yet reported which blocks → | Bell West Inc. | 2933 | Grand Centre | — |
| 2014-04-01 | 587-345 | not yet reported which blocks → | Bell West Inc. | 2933 | Edmonton International Airport | — |
| 2014-04-01 | 614-867 | 0–9 XXXall 10 · 3 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | COLUMBUS | OH |
| 2014-04-01 | 779-251 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | DIXON | IL |
| 2014-04-01 | 878-258 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | SALSGIVER TELECOM, INC. - PA | 103F | FREEPORT | PA |
| 2014-04-01 | 878-295 | 0–9 XXXall 10 · 6 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | GREENSBURG | PA |
| 2014-04-01 | 878-422 | 0XXX2XXX3XXX4XXX7XXX9XXX · 6 holders which blocks → | SALSGIVER TELECOM, INC. - PA | 103F | KITTANNING | PA |
| 2014-04-01 | 970-697 | 0–9 XXXall 10 · 5 holders which blocks → | INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO | 5972 | GRAND JCT | CO |
| 2014-03-31 | 385-528 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | SALT LAKE | UT |
| 2014-03-31 | 480-739 | 0–9 XXXall 10 · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2014-03-31 | 616-228 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | GRAND RPDS | MI |
| 2014-03-31 | 719-309 | 0–9 XXXall 10 · 4 holders which blocks → | PEERLESS NETWORK OF COLORADO, LLC - CO | 278F | COLORDOSPG | CO |
| 2014-03-31 | 778-303 | not yet reported which blocks → | Bell West Inc. | 2933 | Cloverdale | — |
| 2014-03-31 | 778-304 | not yet reported which blocks → | Bell West Inc. | 2933 | Cobble Hill | — |
| 2014-03-31 | 778-305 | not yet reported which blocks → | Bell West Inc. | 2933 | Qualicum | — |
| 2014-03-31 | 778-306 | not yet reported which blocks → | Bell West Inc. | 2933 | Haney | — |
| 2014-03-31 | 778-307 | not yet reported which blocks → | Bell West Inc. | 2933 | Mission | — |
| 2014-03-31 | 778-341 | not yet reported which blocks → | Bell West Inc. | 2933 | Wellington | — |
| 2014-03-31 | 778-342 | not yet reported which blocks → | Bell West Inc. | 2933 | Ladysmith | — |
| 2014-03-31 | 778-343 | not yet reported which blocks → | Bell West Inc. | 2933 | Lantzville | — |
| 2014-03-31 | 778-407 | not yet reported which blocks → | Bell West Inc. | 2933 | Pitt Meadows | — |
| 2014-03-31 | 778-409 | not yet reported which blocks → | Bell West Inc. | 2933 | Osoyoos | — |
| 2014-03-31 | 808-308 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.