NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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 26
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
2023-04-03 474-414 not yet reported which blocks → Fibernetics Corporation 464D Broadview —
2023-04-03 474-415 not yet reported which blocks → Fibernetics Corporation 464D Craik —
2023-04-03 474-416 not yet reported which blocks → Fibernetics Corporation 464D Cupar —
2023-04-03 480-952 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2023-04-03 509-825 1XXX2XXX3XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J MEDICAL LK WA
2023-04-03 573-906 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-04-03 605-820 0XXX which blocks → COMMIO, LLC 939H HURON SD
2023-04-03 609-595 4XXX5XXX7XXX · 3 holders which blocks → COMMIO, LLC 939H DENNISVL NJ
2023-04-03 689-302 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J KISSIMMEE FL
2023-04-03 689-304 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J ORLANDO FL
2023-04-03 719-770 0XXX1XXX7XXX9XXX · 3 holders which blocks → COMMIO, LLC 939H LAMAR CO
2023-04-03 737-360 6XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J JARRELL TX
2023-04-03 743-259 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E MOCKSVILLE NC
2023-04-03 943-219 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H ATLANTA SO GA
2023-04-03 943-220 1XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BREMEN GA
2023-04-03 943-221 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H CUMMING GA
2023-04-03 980-431 0–9 XXXall 10 · 3 holders which blocks → FIVE9, INC. 598J CHARLOTTE NC
2023-04-01 986-252 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LEWISTON ID
2023-03-31 220-247 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H CHESHIRCTR OH
2023-03-31 223-310 0XXX which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F MYERSTOWN PA
2023-03-31 223-312 0XXX1XXX5XXX6XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 MCVEYTOWN PA
2023-03-31 228-820 0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H HURLEY MS
2023-03-31 256-988 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HUNTSVILLE AL
2023-03-31 464-213 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2023-03-31 530-940 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AUBN MAIN CA
2023-03-31 659-268 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BIRMINGHAM AL
2023-03-31 925-508 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C ECONTRCOST CA
2023-03-31 951-625 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C CORONA CA
2023-03-31 951-630 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORENO CA
2023-03-30 341-229 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C OKLD MN-PD CA
2023-03-30 458-303 1XXX3XXX · 2 holders which blocks → ONVOY, LLC - OR 750E RUFUS OR
2023-03-30 839-238 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J COLUMBIA SC
2023-03-29 309-931 0XXX1XXX8XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PEORIA IL
2023-03-29 513-656 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CINCINNATI OH
2023-03-29 572-472 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F SEMINOLE OK
2023-03-29 607-421 1XXX which blocks → PEERING HUB, INC. - NY 818H BINGHAMTON NY
2023-03-29 720-816 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H ALLNSPKLYN CO
2023-03-29 720-832 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H HUDSON CO
2023-03-29 772-282 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 PTST LUCIE FL
2023-03-29 787-939 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2023-03-29 845-939 0XXX which blocks → PEERING HUB, INC. - NY 818H POUGHKEPSI NY
2023-03-29 929-669 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN14 NY
2023-03-29 929-670 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN09 NY
2023-03-29 929-671 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN11 NY
2023-03-29 929-672 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN13 NY
2023-03-29 929-673 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN15 NY
2023-03-29 983-983 0–9 XXXall 10 · 7 holders which blocks → ONVOY SPECTRUM, LLC 624H LONGMONT CO
2023-03-28 276-776 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ABINGDON VA
2023-03-28 364-654 0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - KY 896E ELIZABTHTN KY
2023-03-28 386-369 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J DAYTONABCH FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.