NumberResearchRecent prefix assignments
337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026
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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2012-01-23 | 970-717 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CO | 078F | HAYDEN | CO |
| 2012-01-20 | 289-309 | not yet reported which blocks → | Fibernetics Corporation | 464D | Hamilton | — |
| 2012-01-20 | 518-535 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | DELANSON | NY |
| 2012-01-20 | 518-551 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | PERU | NY |
| 2012-01-20 | 518-552 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | SALEM | NY |
| 2012-01-20 | 518-553 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | VALLEY FLS | NY |
| 2012-01-20 | 647-490 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-01-20 | 647-491 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-01-20 | 647-492 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-01-20 | 647-493 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-01-20 | 647-494 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-01-20 | 778-523 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Canal Flats | — |
| 2012-01-19 | 204-531 | not yet reported which blocks → | Provincial Tel Inc. | 498E | Winkler | — |
| 2012-01-19 | 204-700 | not yet reported which blocks → | Provincial Tel Inc. | 498E | Lundar | — |
| 2012-01-19 | 204-715 | not yet reported which blocks → | Provincial Tel Inc. | 498E | Carman | — |
| 2012-01-19 | 204-812 | not yet reported which blocks → | Provincial Tel Inc. | 498E | Morden | — |
| 2012-01-19 | 289-312 | not yet reported which blocks → | Iristel Inc. | 154E | Oshawa | — |
| 2012-01-19 | 343-357 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Bancroft | — |
| 2012-01-19 | 512-202 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | AUSTIN | TX |
| 2012-01-19 | 514-900 | not yet reported which blocks → | Iristel Inc. | 154E | Pointe-Claire | — |
| 2012-01-19 | 541-502 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OR | 076F | GOLD HILL | OR |
| 2012-01-19 | 579-430 | not yet reported which blocks → | Videotron Ltd. | 8306 | Napierville | — |
| 2012-01-19 | 579-431 | not yet reported which blocks → | Videotron Ltd. | 8306 | Lacolle | — |
| 2012-01-19 | 579-432 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Blaise | — |
| 2012-01-19 | 579-433 | not yet reported which blocks → | Videotron Ltd. | 8306 | Bedford | — |
| 2012-01-19 | 651-302 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | HASTINGS | MN |
| 2012-01-19 | 682-202 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | CLEBURNE | TX |
| 2012-01-19 | 702-708 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | LAS VEGAS | NV |
| 2012-01-19 | 908-224 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NJ | 118F | STROUDSBG | NJ |
| 2012-01-18 | 203-343 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ANSONIDRBY | CT |
| 2012-01-18 | 210-202 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | SANANTONIO | TX |
| 2012-01-18 | 214-846 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | GRANDPRARI | TX |
| 2012-01-18 | 276-293 | 0–9 XXXall 10 · 7 holders which blocks → | MGW NETWORKS, L.L.C. - VA | 609F | GALAX | VA |
| 2012-01-18 | 408-601 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNJS NORTH | CA |
| 2012-01-18 | 408-604 | 0–9 XXXall 10 · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUNNYVALE | CA |
| 2012-01-18 | 563-313 | 0–9 XXXall 10 · 5 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | CRESCO | IA |
| 2012-01-18 | 575-567 | 0–9 XXXall 10 · 6 holders which blocks → | INTERACTIVE NETWORKS CORPORATION -NM | 167F | DEMING | NM |
| 2012-01-18 | 615-903 | 0–9 XXXall 10 · 5 holders which blocks → | TENNESSEE TEL. CO. | 0575 | LAVERGNE | TN |
| 2012-01-18 | 708-541 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BLUEISLAND | IL |
| 2012-01-18 | 713-998 | 0–9 XXXwhole prefix which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | HSTNSUBURB | TX |
| 2012-01-18 | 832-574 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | HSTNSUBURB | TX |
| 2012-01-18 | 832-581 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2012-01-18 | 848-213 | 0–9 XXXall 10 · 4 holders which blocks → | BLOCK LINE SYSTEMS, LLC - NJ | 835E | MONMTH JCT | NJ |
| 2012-01-17 | 226-885 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Listowel | — |
| 2012-01-17 | 289-829 | not yet reported which blocks → | Fido Solutions Inc. | 8820 | Cobourg | — |
| 2012-01-17 | 331-202 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | ELMHURST | IL |
| 2012-01-17 | 331-209 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ELMHURST | IL |
| 2012-01-17 | 613-772 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Perth | — |
| 2012-01-17 | 705-539 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Collingwood | — |
| 2012-01-17 | 778-632 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Grand Forks | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.