NumberResearchRecent prefix assignments
360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026
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 |
|---|---|---|---|---|---|---|
| 2012-04-04 | 778-654 | not yet reported which blocks → | Iristel Inc. | 154E | Vancouver | — |
| 2012-04-04 | 778-655 | not yet reported which blocks → | Iristel Inc. | 154E | Vancouver | — |
| 2012-04-04 | 778-656 | not yet reported which blocks → | Iristel Inc. | 154E | Vancouver | — |
| 2012-04-03 | 269-575 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | WOW! INTERNET, CABLE AND PHONE | 961J | ATHENS | MI |
| 2012-04-03 | 276-323 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - VA | 079F | APPALACHIA | VA |
| 2012-04-03 | 406-404 | 0–9 XXXall 10 · 4 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | BOZEMAN | MT |
| 2012-04-03 | 406-502 | 1XXX2XXX8XXX · 2 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | HELENA | MT |
| 2012-04-03 | 517-343 | 0–9 XXXall 10 · 6 holders which blocks → | WOW! INTERNET, CABLE AND PHONE | 961J | ALBION | MI |
| 2012-04-03 | 587-318 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-04-03 | 587-319 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-04-03 | 587-412 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-04-03 | 587-413 | not yet reported which blocks → | Iristel Inc. | 154E | Edmonton | — |
| 2012-04-03 | 615-988 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2012-04-03 | 647-951 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-04-03 | 647-952 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-04-03 | 647-953 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-04-03 | 647-954 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-04-03 | 647-956 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-04-03 | 647-957 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2012-04-03 | 912-622 | 0–9 XXXall 10 · 6 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | HINESVILLE | GA |
| 2012-04-03 | 912-662 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - GA | 983E | SAVANNAH | GA |
| 2012-04-03 | 989-887 | 0–9 XXXall 10 · 2 holders which blocks → | WOW! INTERNET, CABLE AND PHONE | 961J | FOWLERPWMO | MI |
| 2012-04-02 | 226-253 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Woodstock | — |
| 2012-04-02 | 289-402 | not yet reported which blocks → | Iristel Inc. | 154E | Niagara Falls | — |
| 2012-04-02 | 289-797 | not yet reported which blocks → | Iristel Inc. | 154E | Grimsby | — |
| 2012-04-02 | 423-458 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLEVELAND | TN |
| 2012-04-02 | 450-362 | not yet reported which blocks → | 9164-3122 Quebec inc | 843D | Yamaska | — |
| 2012-04-02 | 470-428 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | ATLANTA | GA |
| 2012-04-02 | 579-589 | not yet reported which blocks → | Iristel Inc. | 154E | Granby | — |
| 2012-04-02 | 778-538 | not yet reported which blocks → | Bell Mobility | 6574 | South Kamloops | — |
| 2012-04-02 | 804-887 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | RICHMOND | VA |
| 2012-04-02 | 832-619 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2012-04-02 | 850-203 | 0–9 XXXall 10 · 6 holders which blocks → | MCC TELEPHONY LLC | 593K | GULFBREEZE | FL |
| 2012-04-02 | 860-503 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARTFORD | CT |
| 2012-04-02 | 902-955 | not yet reported which blocks → | TELUS Mobility | 8303 | Annapolis Royal | — |
| 2012-04-02 | 904-503 | 0–9 XXXall 10 · 2 holders which blocks → | COMCAST IP PHONE, LLC | 318J | JACKSONVL | FL |
| 2012-03-30 | 314-502 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | ST LOUIS | MO |
| 2012-03-30 | 385-393 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - UT | 117F | CLEARFIELD | UT |
| 2012-03-30 | 405-774 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 5813 | OKLA CITY | OK |
| 2012-03-30 | 580-951 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 5813 | LAWTON | OK |
| 2012-03-30 | 585-441 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ROCHESTER | NY |
| 2012-03-30 | 615-997 | 0–9 XXXall 10 · 5 holders which blocks → | NUSO, LLC | 551G | NASHVILLE | TN |
| 2012-03-30 | 619-361 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHULAVISTA | CA |
| 2012-03-29 | 209-269 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | LODI | CA |
| 2012-03-29 | 845-448 | 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | ROSENDALE | NY |
| 2012-03-29 | 901-249 | 0–9 XXXall 10 · 3 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | MEMPHIS | TN |
| 2012-03-28 | 289-724 | not yet reported which blocks → | Iristel Inc. | 154E | Cooksville | — |
| 2012-03-28 | 289-856 | not yet reported which blocks → | Fibernetics Corporation | 464D | Oakville | — |
| 2012-03-28 | 289-857 | not yet reported which blocks → | Fibernetics Corporation | 464D | Thornhill | — |
| 2012-03-28 | 289-861 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Burlington | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.