NumberResearchRecent prefix assignments
338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026
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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-05-20 | 657-576 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ANAHEIM | CA |
| 2022-05-20 | 657-591 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HUNTITNBCH | CA |
| 2022-05-20 | 667-408 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | ANNAPOLIS | MD |
| 2022-05-20 | 706-477 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ROME | GA |
| 2022-05-20 | 805-956 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | GUADALUPE | CA |
| 2022-05-20 | 980-374 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | LOWELL | NC |
| 2022-05-19 | 256-243 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | GUNTERSVL | AL |
| 2022-05-19 | 321-404 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS NETWORKS, LLC | 899D | TITUSVILLE | FL |
| 2022-05-19 | 445-268 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | NEWTOWN | PA |
| 2022-05-19 | 636-630 | 0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks → | COMMIO, LLC | 939H | OFALLON | MO |
| 2022-05-19 | 667-407 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - MD | 876D | BALTIMORE | MD |
| 2022-05-19 | 672-537 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Gabriola Island | — |
| 2022-05-19 | 672-538 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ladysmith | — |
| 2022-05-19 | 672-539 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lantzville | — |
| 2022-05-19 | 672-676 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lasqueti Island | — |
| 2022-05-19 | 672-677 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Nanoose | — |
| 2022-05-19 | 672-720 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Parksville | — |
| 2022-05-19 | 672-721 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Qualicum | — |
| 2022-05-19 | 672-898 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Wellington | — |
| 2022-05-18 | 240-926 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HUGHESVL | MD |
| 2022-05-18 | 240-927 | 0–9 XXXall 10 · 4 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN4 | MD |
| 2022-05-18 | 240-936 | 0–9 XXXall 10 · 2 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | ASHTON236 | MD |
| 2022-05-18 | 263-333 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Montreal | — |
| 2022-05-18 | 263-400 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Lachine | — |
| 2022-05-18 | 263-444 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Montreal | — |
| 2022-05-18 | 263-666 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Montreal | — |
| 2022-05-18 | 263-777 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Roxboro | — |
| 2022-05-18 | 263-800 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Ste-Genevieve | — |
| 2022-05-18 | 263-888 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Pointe-Claire | — |
| 2022-05-18 | 445-246 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHLDLPHZN2 | PA |
| 2022-05-18 | 445-251 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHLDLPHZN1 | PA |
| 2022-05-18 | 445-252 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN39 | PA |
| 2022-05-18 | 470-972 | 0–9 XXXall 10 · 5 holders which blocks → | DOVETEL COMMUNICATIONS, LLC - GA | 362B | TEMPLE | GA |
| 2022-05-18 | 480-904 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PHOENIX | AZ |
| 2022-05-18 | 667-406 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | BALTIMORE | MD |
| 2022-05-18 | 672-301 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Cedar | — |
| 2022-05-18 | 672-302 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Chemainus | — |
| 2022-05-18 | 878-256 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PTTSBGZON1 | PA |
| 2022-05-18 | 928-483 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | YUMA | AZ |
| 2022-05-17 | 213-569 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | LSAN DA 09 | CA |
| 2022-05-17 | 236-952 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Yarrow | — |
| 2022-05-17 | 354-440 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Vaudreuil | — |
| 2022-05-17 | 672-300 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bowser | — |
| 2022-05-17 | 672-476 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Nanaimo | — |
| 2022-05-17 | 925-501 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA |
| 2022-05-17 | 931-365 | 0XXX1XXX2XXX · 3 holders which blocks → | MCC TELEPHONY LLC | 593K | HUNTLAND | TN |
| 2022-05-17 | 951-610 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2022-05-16 | 236-617 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Hope | — |
| 2022-05-16 | 236-618 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Mission | — |
| 2022-05-16 | 236-805 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Rosedale | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.