NumberResearchRecent prefix assignments
358 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
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 |
|---|---|---|---|---|---|---|
| 2005-10-11 | 805-861 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | VNTRA CNTL | CA |
| 2005-10-11 | 813-516 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | TAMPA | FL |
| 2005-10-11 | 909-273 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARROWHEAD | CA |
| 2005-10-11 | 909-693 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | S BERNDINO | CA |
| 2005-10-11 | 916-770 | 0–9 XXXall 10 · 5 holders which blocks → | CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY | 2334 | RSVL MAIN | CA |
| 2005-10-11 | 920-818 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | STURGEONBY | WI |
| 2005-10-11 | 951-796 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2005-10-10 | 304-909 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WHELNGZON3 | WV |
| 2005-10-10 | 773-621 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | CHICGOZN03 | IL |
| 2005-10-08 | 347-607 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | NWYRCYZN05 | NY |
| 2005-10-07 | 320-443 | 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST CLOUD | MN |
| 2005-10-07 | 336-620 | not yet reported which blocks → | CAROLINA WEST WIRELESS, INC. | 5932 | BALDWIN | NC |
| 2005-10-07 | 580-565 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KINGSTON | OK |
| 2005-10-07 | 702-756 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | LAS VEGAS | NV |
| 2005-10-07 | 864-841 | 0–9 XXXall 10 · 9 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - SC | 5258 | WILLIAMSTN | SC |
| 2005-10-06 | 317-483 | 0–9 XXXall 10 · 8 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | MOORESVL | IN |
| 2005-10-06 | 325-726 | 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | COLEMAN | TX |
| 2005-10-06 | 413-331 | 0–9 XXXall 10 · 4 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | CHICOPEE | MA |
| 2005-10-06 | 630-401 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | AURORA | IL |
| 2005-10-06 | 815-581 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | SPRING GRV | IL |
| 2005-10-06 | 815-582 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2005-10-05 | 204-205 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Beausejour | — |
| 2005-10-05 | 225-650 | 0–9 XXXall 10 · 4 holders which blocks → | VOICESTREAM GSM I, LLC | 150C | BATONROUGE | LA |
| 2005-10-05 | 250-805 | not yet reported which blocks → | TELUS | 8086 | Revelstoke | — |
| 2005-10-05 | 250-872 | not yet reported which blocks → | TELUS | 8086 | Okanagan Mission | — |
| 2005-10-05 | 253-304 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TACOMA | WA |
| 2005-10-05 | 306-390 | not yet reported which blocks → | SaskTel Mobility | 9868 | Cut Knife | — |
| 2005-10-05 | 505-608 | 0–9 XXXall 10 · 7 holders which blocks → | T-MOBILE USA, INC. | 6529 | FARMINGTON | NM |
| 2005-10-05 | 514-433 | not yet reported which blocks → | Bell Mobility | 6574 | Montreal | — |
| 2005-10-05 | 514-543 | not yet reported which blocks → | Videotron Ltd. | 8306 | Montreal | — |
| 2005-10-05 | 519-390 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | New Hamburg | — |
| 2005-10-05 | 519-391 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | New Dundee | — |
| 2005-10-05 | 519-394 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Ayr | — |
| 2005-10-05 | 519-400 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Guelph | — |
| 2005-10-05 | 519-500 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Kitchener-Waterloo | — |
| 2005-10-05 | 575-805 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LAS CRUCES | NM |
| 2005-10-05 | 631-638 | 0–9 XXXall 10 · 4 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | STONYBROOK | NY |
| 2005-10-05 | 647-237 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2005-10-05 | 647-340 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Toronto | — |
| 2005-10-05 | 647-405 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2005-10-05 | 647-406 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2005-10-05 | 647-408 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2005-10-05 | 678-914 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | ATLANTA NE | GA |
| 2005-10-05 | 724-905 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | CLYMER | PA |
| 2005-10-05 | 724-915 | 0–9 XXXall 10 · 8 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | HOMER CITY | PA |
| 2005-10-05 | 865-233 | 0–9 XXXall 10 · 3 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | MARYVILLE | TN |
| 2005-10-05 | 902-402 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Halifax | — |
| 2005-10-05 | 920-508 | 8XXX which blocks → | METRO SOUTHWEST PCS, LLP | 9759 | WEYAUWEGA | WI |
| 2005-10-04 | 317-300 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | GREENWOOD | IN |
| 2005-10-04 | 541-320 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SUMPTER | OR |
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.