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
2023-02-10 314-557 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J LADUE MO
2023-02-10 315-680 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J SYRACUSE NY
2023-02-10 320-463 0XXX1XXX6XXX8XXX · 4 holders which blocks → NUSO, LLC 732J WILLMAR MN
2023-02-10 332-272 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2023-02-10 417-586 0XXX1XXX2XXX5XXX6XXX9XXX · 2 holders which blocks → NUSO, LLC 732J JOPLIN MO
2023-02-10 435-350 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 COALVILLE UT
2023-02-10 442-396 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J PALM SPG CA
2023-02-10 447-246 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J DANVILLE IL
2023-02-10 448-218 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J PNAMACYBCH FL
2023-02-10 478-360 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J MACON GA
2023-02-10 505-549 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2023-02-10 507-905 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → NUSO, LLC 732J WINONA MN
2023-02-10 534-210 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NUSO, LLC 732J RIVERFALLS WI
2023-02-10 561-321 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2023-02-10 567-394 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J MANSFIELD OH
2023-02-10 573-861 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J JEFFERSNCY MO
2023-02-10 605-513 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J RAPID CITY SD
2023-02-10 612-495 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J TWINCITIES MN
2023-02-10 639-481 not yet reported which blocks → Access Communications Co-operative Limited 280H Dundurn —
2023-02-10 639-484 not yet reported which blocks → Access Communications Co-operative Limited 280H Nokomis —
2023-02-10 639-529 not yet reported which blocks → Access Communications Co-operative Limited 280H Imperial —
2023-02-10 639-531 not yet reported which blocks → Access Communications Co-operative Limited 280H Bruno —
2023-02-10 639-544 not yet reported which blocks → Access Communications Co-operative Limited 280H Wolseley —
2023-02-10 639-549 not yet reported which blocks → Access Communications Co-operative Limited 280H Hague —
2023-02-10 657-665 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-02-10 657-668 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-02-10 661-603 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2023-02-10 662-870 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J OLIVE BRCH MS
2023-02-10 667-425 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J BALTIMORE MD
2023-02-10 667-428 1XXX8XXX · 2 holders which blocks → NUSO, LLC 732J SALISBURY MD
2023-02-10 689-293 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2023-02-10 719-731 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 COLORDOSPG CO
2023-02-10 762-343 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J AUGUSTA GA
2023-02-10 762-347 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 732J ATHENS GA
2023-02-10 769-297 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J JACKSON MS
2023-02-10 802-204 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J ESSEX JCT VT
2023-02-10 802-205 0XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VT 9450 LYNDONVL VT
2023-02-10 838-265 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ALBANY NY
2023-02-10 912-696 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J BRUNSWICK GA
2023-02-10 920-804 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J APPLETON WI
2023-02-10 971-917 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2023-02-09 249-480 not yet reported which blocks → Iristel Inc. 154E Haliburton —
2023-02-09 256-992 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL AL
2023-02-09 270-414 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J OWENSBORO KY
2023-02-09 272-310 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLEASANTMT PA
2023-02-09 321-407 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C COCOA FL
2023-02-09 448-448 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C DFUNIAKSPG FL
2023-02-09 502-679 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J LOUISVILLE KY
2023-02-09 551-371 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J JERSEYCITY NJ
2023-02-09 607-419 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CORNING NY

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.