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 |
|---|---|---|---|---|---|---|
| 2011-12-06 | 443-571 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | BALTIMORE | MD |
| 2011-12-06 | 518-545 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | ALBANY | NY |
| 2011-12-06 | 587-300 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | High Level | — |
| 2011-12-06 | 857-214 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2011-12-06 | 860-215 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NORWICH | CT |
| 2011-12-05 | 226-224 | not yet reported which blocks → | Videotron Ltd. | 383F | London | — |
| 2011-12-05 | 506-940 | not yet reported which blocks → | Bragg Communications Inc. | 421G | Sackville | — |
| 2011-12-05 | 571-254 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | TRIANGLE | VA |
| 2011-12-05 | 657-224 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | ORANGE | CA |
| 2011-12-05 | 705-301 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Goulais | — |
| 2011-12-05 | 760-853 | 0–9 XXXall 10 · 7 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | YUCCA VLY | CA |
| 2011-12-05 | 848-206 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NJ | 4804 | FARMINGDL | NJ |
| 2011-12-02 | 404-632 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ATLANTA | GA |
| 2011-12-02 | 404-673 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ATLANTA | GA |
| 2011-12-02 | 470-213 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA NE | GA |
| 2011-12-02 | 540-732 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | UNIONVILLE | VA |
| 2011-12-02 | 570-507 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | SCRANTON | PA |
| 2011-12-02 | 717-850 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| 2011-12-02 | 970-855 | 0–9 XXXall 10 · 7 holders which blocks → | COMCAST IP PHONE, LLC | 318J | EDWARDS | CO |
| 2011-12-01 | 352-599 | not yet reported which blocks → | WINDSTREAM FLORIDA, INC. | 0336 | CITRA | FL |
| 2011-12-01 | 438-808 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-12-01 | 438-809 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-12-01 | 438-812 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2011-12-01 | 443-991 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | TOWSON | MD |
| 2011-12-01 | 587-327 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2011-12-01 | 587-328 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2011-12-01 | 587-329 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2011-12-01 | 587-404 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2011-12-01 | 587-405 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2011-11-30 | 386-662 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | WINDSTREAM FLORIDA, INC. | 0336 | FLORAHOME | FL |
| 2011-11-30 | 513-507 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CINCINNATI | OH |
| 2011-11-29 | 202-802 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC | 6402 | WSHNGTNZN1 | DC |
| 2011-11-29 | 567-302 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | MAUMEE | OH |
| 2011-11-29 | 662-408 | 0–9 XXXall 10 · 5 holders which blocks → | POWERTEL MEMPHIS LICENSES, INC. | 7474 | OLIVE BRCH | MS |
| 2011-11-28 | 216-203 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | CLEVELAND | OH |
| 2011-11-28 | 226-790 | not yet reported which blocks → | Iristel Inc. | 154E | Guelph | — |
| 2011-11-28 | 267-713 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHLDLPHZN2 | PA |
| 2011-11-28 | 267-838 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHLDLPHZN1 | PA |
| 2011-11-28 | 321-201 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ORLANDO | FL |
| 2011-11-28 | 417-422 | 0–9 XXXall 10 · 2 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | BOLIVAR | MO |
| 2011-11-28 | 417-909 | 2XXX4XXX9XXX · 3 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | MYRTLE | MO |
| 2011-11-28 | 423-301 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | SO PITTSBG | TN |
| 2011-11-28 | 573-827 | 4XXX7XXX · 2 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | DONIPHAN | MO |
| 2011-11-28 | 609-515 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ | 6391 | ATLNTIC CY | NJ |
| 2011-11-28 | 613-900 | not yet reported which blocks → | Iristel Inc. | 154E | Kingston | — |
| 2011-11-28 | 647-691 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2011-11-28 | 647-692 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2011-11-28 | 647-693 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2011-11-28 | 856-281 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ | 6391 | HADDONFLD | NJ |
| 2011-11-28 | 862-229 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - NJ | 637C | NEWARK | NJ |
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.