Recent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
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 |
|---|---|---|---|---|---|---|
| 2019-04-02 | 343-253 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Coe Hill | — |
| 2019-04-02 | 539-228 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | GROVE | OK |
| 2019-04-02 | 580-414 | 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → | CSC WIRELESS, LLC | 425J | WEATHERFD | OK |
| 2019-04-02 | 825-359 | not yet reported which blocks → | Bell West Inc. | 2933 | Rocky Mountain House | — |
| 2019-04-02 | 838-209 | 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → | VALSTAR, INC. - NY | 9073 | CLAVERACK | NY |
| 2019-04-02 | 907-606 | 0XXX1XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS | 6563 | WILLOW | AK |
| 2019-04-02 | 909-712 | 0–9 XXXall 10 · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | REDLANDS | CA |
| 2019-04-01 | 207-559 | 0XXX1XXX2XXX5XXX6XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - ME | 882G | LINCOLN | ME |
| 2019-04-01 | 325-273 | 0–9 XXXall 10 · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | SWEETWATER | TX |
| 2019-04-01 | 361-363 | 0–9 XXXall 10 · 4 holders which blocks → | CSC WIRELESS, LLC | 425J | VICTORIA | TX |
| 2019-04-01 | 430-271 | 0–9 XXXall 10 · 6 holders which blocks → | CSC WIRELESS, LLC | 425J | GLADEWATER | TX |
| 2019-04-01 | 432-256 | 0–9 XXXall 10 · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | MIDLAND | TX |
| 2019-04-01 | 469-722 | 0–9 XXXall 10 · 4 holders which blocks → | CSC WIRELESS, LLC | 425J | DALLAS | TX |
| 2019-04-01 | 506-890 | not yet reported which blocks → | TELUS Mobility | 8303 | Tracadie | — |
| 2019-04-01 | 512-884 | 0–9 XXXall 10 · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | AUSTIN | TX |
| 2019-04-01 | 530-606 | 0–9 XXXall 10 · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | TRUCKEE | CA |
| 2019-04-01 | 707-719 | 0–9 XXXall 10 · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | BLUE LAKE | CA |
| 2019-04-01 | 806-646 | 0–9 XXXall 10 · 2 holders which blocks → | CSC WIRELESS, LLC | 425J | AMARILLO | TX |
| 2019-04-01 | 806-705 | 0–9 XXXall 10 · 4 holders which blocks → | CSC WIRELESS, LLC | 425J | LUBBOCK | TX |
| 2019-04-01 | 873-355 | not yet reported which blocks → | Bell Mobility | 6574 | Ottawa-Hull | — |
| 2019-04-01 | 979-290 | 0–9 XXXall 10 · 4 holders which blocks → | CSC WIRELESS, LLC | 425J | BRENHAM | TX |
| 2019-03-29 | 380-205 | 0–9 XXXall 10 · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | NEW ALBANY | OH |
| 2019-03-29 | 614-967 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | DUBLIN | OH |
| 2019-03-29 | 640-837 | 0–9 XXXall 10 · 4 holders which blocks → | CORETEL NEW JERSEY, INC. - NJ | 482F | CAPMAYCTHS | NJ |
| 2019-03-29 | 646-993 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | NWYRCYZN01 | NY |
| 2019-03-29 | 647-582 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2019-03-29 | 647-583 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2019-03-29 | 647-585 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2019-03-29 | 662-881 | 0–9 XXXall 10 · 2 holders which blocks → | CSC WIRELESS, LLC | 425J | GREENWOOD | MS |
| 2019-03-29 | 716-576 | 0–9 XXXall 10 · 4 holders which blocks → | CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY | 0096 | SANBORN | NY |
| 2019-03-29 | 803-922 | 0–9 XXXall 10 · 3 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | COLUMBIA | SC |
| 2019-03-29 | 864-773 | 1XXX2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → | SOUTH CAROLINA NET, INC. - SC | 1784 | TROY | SC |
| 2019-03-28 | 239-420 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - FL | 937C | MARCO IS | FL |
| 2019-03-28 | 252-350 | 0–9 XXXall 10 · 2 holders which blocks → | CSC WIRELESS, LLC | 425J | PINETOPS | NC |
| 2019-03-28 | 318-691 | 0–9 XXXall 10 · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | MINDEN | LA |
| 2019-03-28 | 321-306 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS NETWORKS, LLC | 899D | MELBOURNE | FL |
| 2019-03-28 | 337-549 | 0–9 XXXall 10 · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | LK CHARLES | LA |
| 2019-03-28 | 352-632 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - FL | 937C | BEVERLYHLS | FL |
| 2019-03-28 | 352-635 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | ONVOY, LLC - FL | 937C | CEDAR KEYS | FL |
| 2019-03-28 | 352-645 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - FL | 937C | KEYSTN HTS | FL |
| 2019-03-28 | 352-646 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - FL | 937C | OLD TOWN | FL |
| 2019-03-28 | 412-743 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - PA | 547E | CLAIRTON | PA |
| 2019-03-28 | 417-412 | 0–9 XXXall 10 · 2 holders which blocks → | CSC WIRELESS, LLC | 425J | BRANSON | MO |
| 2019-03-28 | 434-278 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - VA | 079F | PINEYRIVER | VA |
| 2019-03-28 | 475-257 | 0–9 XXXall 10 · 4 holders which blocks → | CSC WIRELESS, LLC | 425J | NORWALK | CT |
| 2019-03-28 | 501-338 | 1XXX2XXX3XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | BISMARCK | AR |
| 2019-03-28 | 501-356 | 0–9 XXXall 10 · 6 holders which blocks → | CSC WIRELESS, LLC | 425J | JESSIEVL | AR |
| 2019-03-28 | 501-357 | 2XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | DONALDSON | AR |
| 2019-03-28 | 571-600 | 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | DULLESMTRO | VA |
| 2019-03-28 | 571-833 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | MANASSAS | VA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.