NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2011-01-13 727-600 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLEARWATER FL
2011-01-12 224-500 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2011-01-12 234-600 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WARREN OH
2011-01-12 269-319 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STURGIS MI
2011-01-12 307-338 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 TORRINGTON WY
2011-01-12 401-200 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - RI 977E BRISTOL RI
2011-01-12 513-800 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2011-01-12 520-477 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TUCSON AZ
2011-01-12 862-900 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NEWARK NJ
2011-01-12 970-808 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D DELTA CO
2011-01-11 438-800 not yet reported which blocks → Iristel Inc. 154E Montreal —
2011-01-11 440-600 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J CHAGRINFLS OH
2011-01-11 505-377 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2011-01-11 571-442 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2011-01-11 647-852 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2011-01-11 705-298 not yet reported which blocks → TELUS Integrated Communications 2782 Orillia —
2011-01-11 720-505 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2011-01-11 720-626 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2011-01-11 780-703 not yet reported which blocks → Bragg Communications Inc. 4878 Wainwright —
2011-01-11 901-500 0–9 XXXall 10 · 2 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-01-11 970-573 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 GREELEY CO
2011-01-10 307-369 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CHEYENNE WY
2011-01-10 330-600 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MILLERSBG OH
2011-01-10 404-855 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA GA
2011-01-10 406-996 1XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HELENA MT
2011-01-10 417-414 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD MO
2011-01-10 561-800 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2011-01-10 662-400 0–9 XXXall 10 · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 CLEVELAND MS
2011-01-10 760-879 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EL CENTRO CA
2011-01-10 857-200 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2011-01-10 971-400 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2011-01-07 304-435 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHEAT LAKE WV
2011-01-07 307-337 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CASPER WY
2011-01-07 313-744 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN4 MI
2011-01-07 406-926 0–9 XXXall 10 · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MISSOULA MT
2011-01-07 414-722 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 MILWAUKZN1 WI
2011-01-07 614-800 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
2011-01-07 719-458 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CANON CITY CO
2011-01-07 970-628 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GRAND JCT CO
2011-01-06 330-400 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 AKRON OH
2011-01-06 443-888 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J PRINCEANNE MD
2011-01-06 443-902 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-01-06 540-603 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J LOUISA VA
2011-01-06 662-300 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J CHULAHOMA MS
2011-01-06 904-300 0–9 XXXall 10 · 3 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2011-01-05 587-775 not yet reported which blocks → TELUS 8084 Airdrie —
2011-01-05 618-200 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 BENTON IL
2011-01-05 773-644 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN02 IL
2011-01-05 778-645 not yet reported which blocks → Bell Mobility 6574 Port Edward —
2011-01-05 803-998 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWELLENTN SC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.