NumberResearchRecent prefix assignments
334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026
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 |
|---|---|---|---|---|---|---|
| 2015-09-02 | 226-261 | not yet reported which blocks → | Bell Mobility | 6574 | Stratford | — |
| 2015-09-02 | 248-949 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | MI |
| 2015-09-02 | 431-540 | not yet reported which blocks → | Bell Mobility | 6574 | Brandon | — |
| 2015-09-02 | 431-973 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Strathclair | — |
| 2015-09-02 | 586-338 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-09-02 | 586-414 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-09-02 | 587-454 | not yet reported which blocks → | TELUS | 8084 | Edmonton | — |
| 2015-09-02 | 614-852 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | COLUMBUS | OH |
| 2015-09-02 | 615-716 | 0–9 XXXall 10 · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | FRANKLIN | TN |
| 2015-09-02 | 782-440 | not yet reported which blocks → | Bell Mobility Aliant | 329A | New Glasgow | — |
| 2015-09-02 | 813-724 | 0–9 XXXall 10 · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | TAMPACEN | FL |
| 2015-09-02 | 848-246 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BELMAR | NJ |
| 2015-09-02 | 865-424 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | GREENBACK | TN |
| 2015-09-02 | 901-808 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | MOSCOW | TN |
| 2015-09-01 | 202-839 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC | 6402 | WSHNGTNZN1 | DC |
| 2015-09-01 | 317-827 | 0–9 XXXall 10 · 5 holders which blocks → | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | FISHERS | IN |
| 2015-09-01 | 575-719 | none assigned yet which blocks → | BANDWIDTH.COM CLEC, LLC - NM | 123F | TULAROSA | NM |
| 2015-09-01 | 575-729 | 5XXX6XXX7XXX8XXX · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NM | 123F | ALTO | NM |
| 2015-09-01 | 575-940 | 4XXX5XXX6XXX8XXX · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NM | 123F | CAPITAN | NM |
| 2015-09-01 | 587-455 | not yet reported which blocks → | TELUS | 8084 | Edmonton | — |
| 2015-09-01 | 587-456 | not yet reported which blocks → | TELUS | 8084 | Sherwood Park | — |
| 2015-09-01 | 587-598 | not yet reported which blocks → | TELUS Mobility | 8301 | Edmonton | — |
| 2015-09-01 | 587-599 | not yet reported which blocks → | TELUS Mobility | 8301 | Edmonton | — |
| 2015-09-01 | 606-588 | 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | STNSWHLYCY | KY |
| 2015-09-01 | 720-755 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2015-09-01 | 779-254 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | FRANKFORT | IL |
| 2015-08-31 | 202-876 | 0–9 XXXall 10 · 4 holders which blocks → | VERIZON WASHINGTON DC, INC. | 9211 | WSHNGTNZN1 | DC |
| 2015-08-31 | 219-334 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | CROWNPOINT | IN |
| 2015-08-31 | 424-316 | 0–9 XXXall 10 · 7 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNMN SNMN | CA |
| 2015-08-31 | 430-540 | 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → | PEOPLES COMMUNICATION, INC. -TX | 135H | MYRTLE SPG | TX |
| 2015-08-31 | 469-920 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | FRISCO | TX |
| 2015-08-31 | 479-319 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | BENTONVL | AR |
| 2015-08-31 | 575-221 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NM | 123F | EUNICE | NM |
| 2015-08-31 | 575-651 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NM | 123F | RUIDOSODWN | NM |
| 2015-08-31 | 650-546 | 0–9 XXXall 10 · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | PALO ALTO | CA |
| 2015-08-31 | 669-265 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | SNJS NORTH | CA |
| 2015-08-31 | 870-916 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | YELCOT VIDEO GROUP, INC. - AR | 398H | CALICOROCK | AR |
| 2015-08-28 | 218-504 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ELY | MN |
| 2015-08-28 | 224-985 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PARK RIDGE | IL |
| 2015-08-28 | 252-765 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | TRI-COUNTY COMMUNICATIONS INC - NC | 351H | BATH | NC |
| 2015-08-28 | 312-871 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL |
| 2015-08-28 | 321-419 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MELBOURNE | FL |
| 2015-08-28 | 430-901 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | OMAHA | TX |
| 2015-08-28 | 469-731 | 0–9 XXXall 10 · 6 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | FRISCO | TX |
| 2015-08-28 | 479-231 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SPRINGDALE | AR |
| 2015-08-28 | 480-749 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ |
| 2015-08-28 | 484-658 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | ALLENTOWN | PA |
| 2015-08-28 | 502-919 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY | 6500 | LOUISVILLE | KY |
| 2015-08-28 | 505-910 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | ALBUQURQUE | NM |
| 2015-08-28 | 513-986 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - OH | 464C | CLERMONT | OH |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.