NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2004-03-15 845-789 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMENIA NY
2004-03-15 865-392 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J CONCORD TN
2004-03-15 905-235 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Newmarket —
2004-03-15 907-375 not yet reported which blocks → GCI COMMUNICATION CORP. DBA GENERAL COMMUNICATION 7785 ANCHORAGE AK
2004-03-15 912-291 0XXX7XXX8XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 STSIMONSIS GA
2004-03-15 989-218 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HALE MI
2004-03-12 252-915 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HENDERSON NC
2004-03-12 405-201 0–9 XXXwhole prefix which blocks → UNITED STATES CELLULAR - OK 6272 OKLA CITY OK
2004-03-12 618-302 3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ALBION IL
2004-03-12 618-306 7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CAIRO IL
2004-03-12 618-308 6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 MCLEANSBO IL
2004-03-12 618-313 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 RIDGWAY IL
2004-03-12 618-314 7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NASHVILLE IL
2004-03-12 620-207 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → UNITED STATES CELLULAR - KS 6267 NICKERSON KS
2004-03-12 716-237 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHAUTAUQUA NY
2004-03-12 718-594 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2004-03-12 724-596 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 APOLLO PA
2004-03-12 814-423 1XXX2XXX3XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOYSBURG PA
2004-03-12 828-406 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BOONE NC
2004-03-12 845-588 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NARROWSBG NY
2004-03-12 912-256 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JESUP GA
2004-03-12 978-332 0–9 XXXall 10 · 3 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 LAWRENCE MA
2004-03-11 203-347 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BYRAM CT
2004-03-11 218-277 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MN 184D CROOKSTON MN
2004-03-11 218-535 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BATTLELAKE MN
2004-03-11 239-233 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FTMYERSBCH FL
2004-03-11 330-632 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EROCHESTER OH
2004-03-11 518-291 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CATSKILL NY
2004-03-11 562-481 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2004-03-11 607-282 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 COOPERSTN NY
2004-03-11 706-389 0XXX1XXX4XXX5XXX8XXX9XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATHENS GA
2004-03-11 716-338 0–9 XXXall 10 · 3 holders which blocks → DFT LOCAL SERVICE CORP. DBA DFT SELECT ONE-NY 5367 JAMESTOWN NY
2004-03-11 805-286 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 PASOROBLES CA
2004-03-11 813-261 not yet reported which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 TAMPA FL
2004-03-11 828-212 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → WINDSTREAM COMMUNICATIONS, INC. - NC 7970 GRANITEFLS NC
2004-03-11 905-394 not yet reported which blocks → Bell Canada 8051 Niagara Falls —
2004-03-10 210-204 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-03-10 270-473 1XXX3XXX4XXX7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MUNFORDVL KY
2004-03-10 512-215 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-03-10 573-405 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 VIENNA MO
2004-03-10 573-407 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CROCKER MO
2004-03-10 573-408 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 DIXON MO
2004-03-10 585-213 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WAYLAND NY
2004-03-10 713-261 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2004-03-10 870-785 0XXX1XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L OIL TROUGH AR
2004-03-10 906-203 2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SALTSTMARI MI
2004-03-10 908-321 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 OLDWICK NJ
2004-03-10 989-217 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GAYLORD MI
2004-03-09 219-220 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FBN INDIANA, INC. - IN 4117 REYNOLDS IN
2004-03-09 219-330 0XXX3XXX · 2 holders which blocks → FBN INDIANA, INC. - IN 4117 SAN PIERRE IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.