NumberResearchRecent prefix assignments
357 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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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-08-02 | 516-930 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | NASSAUZN01 | NY |
| 2022-08-02 | 567-756 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | MANSFIELD | OH |
| 2022-08-02 | 605-506 | 9XXX which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | WORTHING | SD |
| 2022-08-02 | 672-673 | not yet reported which blocks → | Videotron Ltd. | 787G | Vancouver | — |
| 2022-08-02 | 813-761 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - FL | 937C | TAMPACEN | FL |
| 2022-08-02 | 813-921 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - FL | 937C | TAMPANTH | FL |
| 2022-08-02 | 825-865 | not yet reported which blocks → | Videotron Ltd. | 787G | Edmonton | — |
| 2022-08-02 | 945-251 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX |
| 2022-08-02 | 956-769 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX which blocks → | STPCS JOINT VENTURE, LLC | 4290 | RAYMONDVL | TX |
| 2022-08-01 | 551-354 | 0–9 XXXall 10 · 4 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | HACKENSACK | NJ |
| 2022-08-01 | 640-229 | 0–9 XXXall 10 · 5 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | CRANBURY | NJ |
| 2022-08-01 | 732-426 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NJ | 118F | SOUTHRIVER | NJ |
| 2022-08-01 | 949-818 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - CA | 649C | IRVINE | CA |
| 2022-07-29 | 386-351 | 0XXX1XXX · 2 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | JENNINGS | FL |
| 2022-07-29 | 641-290 | 2XXX9XXX · 2 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | MILO | IA |
| 2022-07-29 | 669-323 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2022-07-29 | 770-430 | 0–9 XXXall 10 · 4 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | ATLANTA SO | GA |
| 2022-07-29 | 873-713 | not yet reported which blocks → | Iristel Inc. | 154E | Grenville | — |
| 2022-07-29 | 956-439 | 0–9 XXXwhole prefix which blocks → | STPCS JOINT VENTURE, LLC | 4290 | LAREDO | TX |
| 2022-07-28 | 206-647 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - WA | 483E | RICHMNDBCH | WA |
| 2022-07-28 | 224-471 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | DESPLAINES | IL |
| 2022-07-28 | 262-270 | 0–9 XXXall 10 · 3 holders which blocks → | UNITED STATES CELLULAR - WI | 6274 | RACINE | WI |
| 2022-07-28 | 262-301 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | RACINE | WI |
| 2022-07-28 | 313-639 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2022-07-28 | 314-980 | 0–9 XXXwhole prefix which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO |
| 2022-07-28 | 365-913 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2022-07-28 | 385-471 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | KAYSVILLE | UT |
| 2022-07-28 | 385-475 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - UT | 871E | KAYSVILLE | UT |
| 2022-07-28 | 437-418 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-07-28 | 437-419 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-07-28 | 442-391 | 0XXX1XXX · 2 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | WINTERHVN | CA |
| 2022-07-28 | 512-500 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | AUSTIN | TX |
| 2022-07-28 | 612-488 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - MN | 184D | TWINCITIES | MN |
| 2022-07-28 | 641-268 | 1XXX2XXX · 2 holders which blocks → | AUREON COMMUNICATIONS, LLC | 444G | LACONA | IA |
| 2022-07-28 | 737-329 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | AUSTIN | TX |
| 2022-07-28 | 803-715 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | ORANGEBURG | SC |
| 2022-07-28 | 826-202 | 0–9 XXXall 10 · 2 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CHRISTISBG | VA |
| 2022-07-28 | 826-926 | 6XXX7XXX9XXX which blocks → | ONVOY, LLC - VA | 138E | ORISKANY | VA |
| 2022-07-28 | 857-396 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2022-07-28 | 857-397 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ROXBURY | MA |
| 2022-07-28 | 864-259 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | GREENWOOD | SC |
| 2022-07-28 | 925-505 | 0–9 XXXall 10 · 5 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | LIVERMORE | CA |
| 2022-07-28 | 940-275 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | GAINESVL | TX |
| 2022-07-28 | 948-203 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | NRFOLKZON1 | VA |
| 2022-07-28 | 952-254 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | TWINCITIES | MN |
| 2022-07-28 | 956-339 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | EDINBURG | TX |
| 2022-07-27 | 301-635 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MD | 071F | WSHNGTNZN5 | MD |
| 2022-07-27 | 319-340 | 0–9 XXXall 10 · 7 holders which blocks → | T-MOBILE USA, INC. | 6529 | WATERLOO | IA |
| 2022-07-27 | 580-469 | 0XXX1XXX2XXX9XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | SAYRE | OK |
| 2022-07-27 | 743-248 | 0XXX1XXX2XXX6XXX7XXX8XXX9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC | 6324 | BROOKS | NC |
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.