NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2012-03-14 314-441 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2012-03-14 405-318 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-03-14 405-394 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-03-14 405-423 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-03-14 405-435 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-03-14 405-439 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-03-14 405-446 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-03-14 405-465 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-03-14 405-719 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-03-14 405-727 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2012-03-14 502-536 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LOUISVILLE KY
2012-03-14 612-231 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2012-03-14 740-608 0–9 XXXall 10 · 3 holders which blocks → HORIZON SERVICES, INC. - OH 601G ATHENS OH
2012-03-14 740-716 0–9 XXXall 10 · 4 holders which blocks → HORIZON SERVICES, INC. - OH 601G PORTSMOUTH OH
2012-03-14 918-370 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-404 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-500 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-568 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-703 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-861 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-891 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-896 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-934 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-14 918-982 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2012-03-13 205-551 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K PHILCMPBLL AL
2012-03-13 205-606 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K SULLIGENT AL
2012-03-13 251-260 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F MELVIN AL
2012-03-13 306-954 not yet reported which blocks → Shaw Telecom Inc. 497E Saskatoon —
2012-03-13 405-468 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-03-13 413-276 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2012-03-13 516-427 0–9 XXXall 10 · 2 holders which blocks → CSC VOICE, LLC 612K NASSAUZN05 NY
2012-03-13 570-710 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 HAZLETON PA
2012-03-13 587-269 not yet reported which blocks → Shaw Telecom Inc. 497E Sherwood Park —
2012-03-13 587-273 not yet reported which blocks → Shaw Telecom Inc. 497E Red Deer —
2012-03-13 587-274 not yet reported which blocks → Shaw Telecom Inc. 497E Leduc —
2012-03-13 587-276 not yet reported which blocks → Shaw Telecom Inc. 497E Fort McMurray —
2012-03-13 587-285 not yet reported which blocks → Shaw Telecom Inc. 497E Fort Saskatchewan —
2012-03-13 587-286 not yet reported which blocks → Shaw Telecom Inc. 497E Spruce Grove —
2012-03-13 587-289 not yet reported which blocks → Shaw Telecom Inc. 497E Medicine Hat —
2012-03-13 587-290 not yet reported which blocks → Shaw Telecom Inc. 497E St. Albert —
2012-03-13 587-425 not yet reported which blocks → Shaw Telecom Inc. 497E Lethbridge —
2012-03-13 587-523 not yet reported which blocks → Shaw Telecom Inc. 497E Edmonton —
2012-03-13 778-346 not yet reported which blocks → Shaw Telecom Inc. 497E Campbell River —
2012-03-13 778-418 not yet reported which blocks → Shaw Telecom Inc. 497E Willow Point —
2012-03-13 778-419 not yet reported which blocks → Shaw Telecom Inc. 497E Port Alberni —
2012-03-13 802-582 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ST ALBANS VT
2012-03-13 914-327 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K WSCHSTZN01 NY
2012-03-13 917-480 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN12 NY
2012-03-13 918-904 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-03-12 202-815 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC

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.