NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2013-04-16 956-410 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LOSFRESNOS TX
2013-04-16 984-664 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 RALEIGH NC
2013-04-15 256-203 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HUNTSVILLE AL
2013-04-15 425-209 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2013-04-15 484-909 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E PARKESBURG PA
2013-04-15 715-753 1XXX2XXX3XXX6XXX · 3 holders which blocks → MIDWAY TEL. CO. 0909 MEDFORD WI
2013-04-15 716-273 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E SALAMANCA NY
2013-04-15 719-493 0–9 XXXall 10 · 5 holders which blocks → TELIAX, INC. - CO 567G COLORDOSPG CO
2013-04-15 774-409 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F TAUNTON MA
2013-04-15 845-274 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEW CITY NY
2013-04-15 909-312 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDLANDS CA
2013-04-15 952-205 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 TWINCITIES MN
2013-04-12 204-321 not yet reported which blocks → MTS Inc. 8088 Steinbach —
2013-04-12 204-579 not yet reported which blocks → MTS Inc. 8088 Brandon —
2013-04-12 646-676 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY
2013-04-12 778-460 not yet reported which blocks → Shaw Telecom Inc. 497E Castlegar —
2013-04-12 819-702 not yet reported which blocks → Bell Mobility 6574 Ville-Marie —
2013-04-11 262-214 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F WHITEWATER WI
2013-04-11 262-419 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F JACKSON WI
2013-04-11 302-501 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 NEW CASTLE DE
2013-04-11 573-273 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ADVANCE MO
2013-04-11 573-975 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MEXICO MO
2013-04-11 724-670 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E NEWBEDFORD PA
2013-04-11 763-308 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MINNESOTA, LLC - MN 107F PRINCETON MN
2013-04-11 770-203 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E CUMMING GA
2013-04-11 772-800 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C PTST LUCIE FL
2013-04-11 779-333 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C FRANKFORT IL
2013-04-11 779-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C CRYSTAL LK IL
2013-04-11 832-733 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2013-04-11 860-390 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F LYME CT
2013-04-11 860-400 0–9 XXXall 10 · 8 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F LEDYARD CT
2013-04-11 860-407 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F JEWETTCITY CT
2013-04-11 860-744 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F CLINTON CT
2013-04-11 872-356 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C CHICGOZN10 IL
2013-04-11 872-639 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C CHICGOZN07 IL
2013-04-11 909-326 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E POMONA CA
2013-04-11 980-206 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F TROUTMAN NC
2013-04-11 980-494 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F STANLEY NC
2013-04-10 224-864 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E MUNDELEIN IL
2013-04-10 224-901 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E PISTAKHLDS IL
2013-04-10 254-530 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 MALONE TX
2013-04-10 254-626 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 BYNUM TX
2013-04-10 254-994 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 MOUNT CALM TX
2013-04-10 267-875 0–9 XXXall 10 · 8 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E QUAKERTOWN PA
2013-04-10 289-964 not yet reported which blocks → Comwave Networks 160G Newtonville —
2013-04-10 331-240 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E W CHICAGO IL
2013-04-10 331-803 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E LEMONT IL
2013-04-10 431-233 not yet reported which blocks → MTS Inc. 991B Ste. Rose du Lac —
2013-04-10 440-444 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LORAIN OH
2013-04-10 470-297 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF GEORGIA, LLC - GA 909E CUMMING GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.