Recent prefix assignments
334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2019-10-04 | 661-884 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - CA | 649C | WASCO | CA |
| 2019-10-04 | 786-723 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2019-10-03 | 209-510 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | MANTECA | CA |
| 2019-10-03 | 209-660 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - CA | 649C | JACKSON | CA |
| 2019-10-03 | 236-804 | not yet reported which blocks → | Iristel Inc. | 154E | Chilliwack | — |
| 2019-10-03 | 267-817 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - PA | 547E | PHLDLPHZN1 | PA |
| 2019-10-03 | 419-314 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | FOSTORIA | OH |
| 2019-10-03 | 431-533 | not yet reported which blocks → | Iristel Inc. | 154E | Austin | — |
| 2019-10-03 | 434-443 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - VA | 138E | CHARLOTSVL | VA |
| 2019-10-03 | 506-305 | not yet reported which blocks → | Iristel Inc. | 154E | Edmundston | — |
| 2019-10-03 | 520-436 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - AZ | 630E | HAYDEN | AZ |
| 2019-10-03 | 520-438 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - AZ | 630E | WHITLOW | AZ |
| 2019-10-03 | 602-691 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ |
| 2019-10-03 | 825-797 | not yet reported which blocks → | Iristel Inc. | 154E | Hanna | — |
| 2019-10-03 | 825-798 | not yet reported which blocks → | Iristel Inc. | 154E | Drumheller | — |
| 2019-10-03 | 902-612 | not yet reported which blocks → | Iristel Inc. | 154E | Amherst | — |
| 2019-10-03 | 909-776 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | UPLAND | CA |
| 2019-10-03 | 937-761 | 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TROY | OH |
| 2019-10-03 | 970-671 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | ONVOY, LLC - CO | 026D | COLLBRAN | CO |
| 2019-10-02 | 205-883 | 0–9 XXXall 10 · 2 holders which blocks → | AIRUS, INC. - AL | 476H | W BLOCTON | AL |
| 2019-10-02 | 209-399 | 0–9 XXXall 10 · 5 holders which blocks → | HD CARRIER LLC | 321J | MANTECA | CA |
| 2019-10-02 | 318-695 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CSC VOICE, LLC | 612K | CHOUDRANT | LA |
| 2019-10-02 | 332-400 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | NWYRCYZN01 | NY |
| 2019-10-02 | 407-305 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - FL | 937C | KISSIMMEE | FL |
| 2019-10-02 | 442-312 | 0XXX1XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | PINE CREEK | CA |
| 2019-10-02 | 539-237 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | UNITED STATES CELLULAR - OK | 6272 | STIGLER | OK |
| 2019-10-02 | 626-519 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ALHAMBRA | CA |
| 2019-10-02 | 651-372 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - MN | 184D | NORTH BRCH | MN |
| 2019-10-02 | 657-397 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SANTA ANA | CA |
| 2019-10-02 | 763-299 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - MN | 184D | PRINCETON | MN |
| 2019-10-02 | 774-398 | 0–9 XXXall 10 · 2 holders which blocks → | AIRUS, INC. - MA | 428H | BROCKTON | MA |
| 2019-10-02 | 803-889 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - SC | 548E | LK WYLIE W | SC |
| 2019-10-02 | 803-891 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - SC | 548E | SHARON | SC |
| 2019-10-02 | 803-902 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - SC | 548E | YORK | SC |
| 2019-10-02 | 803-910 | 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - SC | 548E | BOWMAN | SC |
| 2019-10-02 | 803-916 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - SC | 548E | BRANCHVL | SC |
| 2019-10-02 | 820-280 | 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | HD CARRIER LLC | 321J | LOS ALAMOS | CA |
| 2019-10-02 | 825-799 | not yet reported which blocks → | Iristel Inc. | 154E | Grande Prairie | — |
| 2019-10-02 | 850-979 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - FL | 937C | MILTON | FL |
| 2019-10-02 | 854-220 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - SC | 548E | SUMMERVL | SC |
| 2019-10-02 | 854-843 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - SC | 548E | LAMAR | SC |
| 2019-10-02 | 938-201 | 0–9 XXXall 10 · 3 holders which blocks → | AIRUS, INC. - AL | 476H | CHILDERSBG | AL |
| 2019-10-02 | 951-507 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MIRA LOMA | CA |
| 2019-10-01 | 332-206 | 0–9 XXXall 10 · 2 holders which blocks → | PEERLESS NETWORK OF NEW YORK, LLC - NY | 155E | NWYRCYZN01 | NY |
| 2019-10-01 | 360-995 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | OLYMPIA | WA |
| 2019-10-01 | 423-219 | 0–9 XXXall 10 · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | CHARLESTON | TN |
| 2019-10-01 | 423-515 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - TN | 525E | SO PITTSBG | TN |
| 2019-10-01 | 423-919 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - TN | 525E | NEWTAZWELL | TN |
| 2019-10-01 | 475-263 | 0–9 XXXall 10 · 7 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | WATERBURY | CT |
| 2019-10-01 | 629-600 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - TN | 525E | LEBANON | TN |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.