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
2013-08-13 408-816 0–9 XXXall 10 · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SNJS WEST CA
2013-08-13 442-221 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BENTON CA
2013-08-13 573-412 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 PORTAGEVL MO
2013-08-13 681-758 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FAIRMONT WV
2013-08-13 702-908 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAS VEGAS NV
2013-08-13 737-222 0–9 XXXall 10 · 5 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D AUSTIN TX
2013-08-13 816-897 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F KANSASCITY MO
2013-08-13 912-999 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H SAVANNAH GA
2013-08-12 208-972 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID 6565 BOISE ID
2013-08-12 470-268 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA NE GA
2013-08-12 901-203 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF TENNESSEE, LLC - TN 276F MEMPHIS TN
2013-08-10 575-361 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 CARLSBAD NM
2013-08-10 575-626 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ROSWELL NM
2013-08-10 575-703 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ARTESIA NM
2013-08-09 226-962 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Guelph —
2013-08-09 226-968 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 London —
2013-08-09 226-969 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 London —
2013-08-09 603-309 0–9 XXXall 10 · 6 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 NEWPORT NH
2013-08-09 774-504 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 TAUNTON MA
2013-08-08 314-326 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-08-08 407-528 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → SMARTEDGENET, LLC 159H CELEBRATN FL
2013-08-08 415-653 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-08-08 424-329 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CMTN GRDN CA
2013-08-08 470-223 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2013-08-08 706-671 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 DALTON GA
2013-08-08 774-503 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ROCHESTER MA
2013-08-08 774-509 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FRAMINGHAM MA
2013-08-07 231-484 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E EASTJORDAN MI
2013-08-07 509-221 0–9 XXXall 10 · 3 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KENNEWICK WA
2013-08-07 803-907 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 COLUMBIA SC
2013-08-07 906-441 0XXX1XXX7XXX · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F MUNISING MI
2013-08-06 201-899 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 CLOSTER NJ
2013-08-06 469-535 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 FRISCO TX
2013-08-05 234-253 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 SEBRING OH
2013-08-05 385-695 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MIDVALE UT
2013-08-05 404-807 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2013-08-05 480-402 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
2013-08-05 573-488 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ASHLAND MO
2013-08-05 702-761 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LAS VEGAS NV
2013-08-05 717-719 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 COLUMBIA PA
2013-08-05 915-228 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 EL PASO TX
2013-08-02 224-249 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C ALGONQUIN IL
2013-08-02 323-489 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2013-08-02 559-536 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MADERA CA
2013-08-02 614-674 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2013-08-02 681-230 0–9 XXXall 10 · 6 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 CLENDENIN WV
2013-08-02 681-288 1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 COWEN WV
2013-08-02 681-334 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 OCEANA WV
2013-08-02 681-351 0XXX1XXX2XXX3XXX4XXX6XXX · 6 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 HAMLIN WV
2013-08-02 681-352 0–9 XXXall 10 · 6 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 MAN WV

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.