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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2012-06-25 | 585-435 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | ROCHESTER | NY |
| 2012-06-25 | 612-300 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TWINCITIES | MN |
| 2012-06-25 | 872-208 | 0–9 XXXall 10 · 5 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | CHICGOZN02 | IL |
| 2012-06-25 | 925-446 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | CONCORD | CA |
| 2012-06-22 | 240-800 | 0–9 XXXall 10 · 7 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | WSHNGTNZN2 | MD |
| 2012-06-22 | 313-782 | 0–9 XXXall 10 · 4 holders which blocks → | MICHIGAN BELL TEL CO | 9323 | DETROITZN1 | MI |
| 2012-06-22 | 385-345 | 0–9 XXXall 10 · 5 holders which blocks → | QWEST CORPORATION | 9636 | LEHI | UT |
| 2012-06-22 | 404-390 | 0–9 XXXall 10 · 3 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | ATLANTA | GA |
| 2012-06-22 | 404-481 | 0–9 XXXall 10 · 5 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | ATLANTA | GA |
| 2012-06-22 | 404-990 | 0–9 XXXall 10 · 4 holders which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | ATLANTA | GA |
| 2012-06-22 | 431-999 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2012-06-22 | 438-969 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2012-06-22 | 438-980 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2012-06-22 | 438-981 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2012-06-22 | 438-982 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2012-06-22 | 438-983 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2012-06-22 | 438-984 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2012-06-22 | 438-985 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2012-06-22 | 570-666 | 0–9 XXXall 10 · 6 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | WILLIAMSPT | PA |
| 2012-06-22 | 580-665 | 0–9 XXXall 10 · 4 holders which blocks → | UNITED STATES CELLULAR - OK | 6272 | ADA | OK |
| 2012-06-22 | 646-628 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | NWYRCYZN01 | NY |
| 2012-06-22 | 647-849 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2012-06-22 | 720-553 | 0–9 XXXwhole prefix which blocks → | QWEST CORPORATION | 9636 | DENVER | CO |
| 2012-06-22 | 772-222 | 0–9 XXXall 10 · 4 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | HOBE SOUND | FL |
| 2012-06-22 | 772-888 | 0–9 XXXall 10 · 7 holders which blocks → | TERRA NOVA TELECOM, INC. - FL | 382G | STUART | FL |
| 2012-06-22 | 917-565 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | NWYRCYZN04 | NY |
| 2012-06-22 | 928-362 | 0–9 XXXall 10 · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SAFFORD | AZ |
| 2012-06-21 | 316-202 | 0–9 XXXall 10 · 2 holders which blocks → | GIANT COMMUNICATIONS, INC. - KS | 5237 | WICHITA | KS |
| 2012-06-21 | 609-600 | 0–9 XXXall 10 · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | WILDWOOD | NJ |
| 2012-06-21 | 803-314 | 0–9 XXXwhole prefix which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | COLUMBIA | SC |
| 2012-06-21 | 850-300 | 0–9 XXXall 10 · 3 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | TALLAHASSE | FL |
| 2012-06-20 | 205-719 | 0–9 XXXall 10 · 3 holders which blocks → | POWERTEL BIRMINGHAM LICENSES, INC. | 7475 | BIRMINGHAM | AL |
| 2012-06-20 | 289-952 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Oakville | — |
| 2012-06-20 | 289-962 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Burlington | — |
| 2012-06-20 | 289-980 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Ajax-Pickering | — |
| 2012-06-20 | 312-561 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | CHICGOZN01 | IL |
| 2012-06-20 | 320-347 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | NEW LONDON | MN |
| 2012-06-20 | 320-409 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | SPICER | MN |
| 2012-06-20 | 331-214 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | DOWNERSGRV | IL |
| 2012-06-20 | 507-603 | 0XXX which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | KASSON | MN |
| 2012-06-20 | 587-294 | not yet reported which blocks → | TELUS | 8084 | Westlock | — |
| 2012-06-20 | 587-939 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Calgary | — |
| 2012-06-20 | 740-715 | 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | JUNCTIONCY | OH |
| 2012-06-20 | 740-805 | 0XXX1XXX2XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | GLOUSTER | OH |
| 2012-06-20 | 740-901 | 0–9 XXXall 10 · 8 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | LANCASTER | OH |
| 2012-06-20 | 779-206 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | JOLIET | IL |
| 2012-06-19 | 239-224 | 0–9 XXXall 10 · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | FTMYERSBCH | FL |
| 2012-06-19 | 289-451 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Markham | — |
| 2012-06-19 | 289-452 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Richmond Hill | — |
| 2012-06-19 | 289-453 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Newmarket | — |
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.