NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 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
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2011-11-11 270-336 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C BREMEN KY
2011-11-11 270-372 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C PLEASATRDG KY
2011-11-11 270-613 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C HABIT KY
2011-11-11 270-673 0XXX1XXX7XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C ISLAND KY
2011-11-11 561-203 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E JUPITER FL
2011-11-11 661-434 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2011-11-11 813-308 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E TAMPAEST FL
2011-11-11 832-570 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2011-11-11 917-831 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN14 NY
2011-11-10 202-760 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2011-11-10 226-369 not yet reported which blocks → TELUS Integrated Communications 2782 Elora —
2011-11-10 226-370 not yet reported which blocks → TELUS Integrated Communications 2782 Fergus —
2011-11-10 240-265 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2011-11-10 240-272 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2011-11-10 319-536 0–9 XXXall 10 · 6 holders which blocks → SHELLSBURG CABLEVISION, INC. - IA 527G CEDAR RPDS IA
2011-11-10 386-201 9XXX which blocks → WINDSTREAM FLORIDA, INC. 0336 HIGH SPG FL
2011-11-10 386-203 9XXX which blocks → WINDSTREAM FLORIDA, INC. 0336 CRESCENTCY FL
2011-11-10 407-203 0–9 XXXall 10 · 3 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L ORLANDO FL
2011-11-10 587-268 not yet reported which blocks → Bell West Inc. 2933 Stony Plain —
2011-11-10 614-603 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
2011-11-10 702-701 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAS VEGAS NV
2011-11-10 775-203 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 RENO NV
2011-11-10 786-410 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E HOMESTEAD FL
2011-11-10 857-202 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2011-11-10 862-217 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 MORRISTOWN NJ
2011-11-09 206-641 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2011-11-09 218-210 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E BEMIDJI MN
2011-11-09 319-343 0–9 XXXall 10 · 3 holders which blocks → SHELLSBURG CABLEVISION, INC. - IA 527G CENTER PT IA
2011-11-09 443-634 0–9 XXXwhole prefix which blocks → VERIZON MARYLAND, INC. 9212 WATERLO236 MD
2011-11-09 615-806 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2011-11-09 646-568 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2011-11-09 917-618 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2011-11-09 920-709 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J JUNEAU WI
2011-11-08 202-740 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2011-11-08 225-224 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-11-08 331-208 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 AURORA IL
2011-11-08 404-621 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2011-11-08 404-709 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2011-11-08 407-631 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ORLANDO FL
2011-11-08 484-628 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 READING PA
2011-11-08 708-509 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-11-08 708-559 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-11-08 813-304 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2011-11-08 971-256 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF OREGON, LLC - OR 157F PORTLAND OR
2011-11-07 240-270 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2011-11-07 410-618 0–9 XXXall 10 · 5 holders which blocks → IDT AMERICA, CORP. - MD 228C PERRYVILLE MD
2011-11-07 412-627 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-11-07 469-267 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ROCKWALL TX
2011-11-07 484-268 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2011-11-07 614-541 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 HILLIARD OH

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.