NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2020-12-17 385-397 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-12-17 505-447 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 GRANTS NM
2020-12-17 531-252 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NE 995E CRESTON NE
2020-12-17 607-667 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CORNING NY
2020-12-17 657-469 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2020-12-17 657-473 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-12-17 689-910 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C APOPKA FL
2020-12-17 734-488 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C CHELSEA MI
2020-12-17 813-809 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C TAMPANTH FL
2020-12-17 912-296 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D SCREVEN GA
2020-12-17 913-392 0–9 XXXall 10 · 3 holders which blocks → STRATUS NETWORKS 495J KANSASCITY KS
2020-12-17 947-479 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C ROCHESTER MI
2020-12-16 208-872 0–9 XXXall 10 · 6 holders which blocks → TDS METROCOM, LLC 520K BOISE ID
2020-12-16 239-392 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C CAPE CORAL FL
2020-12-16 249-646 not yet reported which blocks → Fibernetics Corporation 464D Bethany —
2020-12-16 249-647 not yet reported which blocks → Fibernetics Corporation 464D Bailieboro —
2020-12-16 249-648 not yet reported which blocks → Fibernetics Corporation 464D Apsley —
2020-12-16 325-532 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C ALBANY TX
2020-12-16 365-662 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Oshawa —
2020-12-16 367-588 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Alma —
2020-12-16 367-688 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Alma —
2020-12-16 367-788 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Alma —
2020-12-16 367-880 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Alma —
2020-12-16 367-881 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Alma —
2020-12-16 442-349 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-12-16 442-351 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-12-16 442-352 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-16 463-255 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D PLAINFIELD IN
2020-12-16 530-703 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OROVILLE CA
2020-12-16 562-535 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2020-12-16 619-883 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-12-16 619-891 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-12-16 619-901 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-12-16 631-810 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C LINDENHST NY
2020-12-16 651-382 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MN 184D LAKE CITY MN
2020-12-16 657-468 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-12-16 719-601 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CO 026D PUEBLO CO
2020-12-16 747-304 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VAN NUYS CA
2020-12-16 772-251 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PTST LUCIE FL
2020-12-16 772-588 0–9 XXXall 10 · 8 holders which blocks → FRACTEL, LLC 965H VERO BEACH FL
2020-12-16 786-434 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C HOMESTEAD FL
2020-12-16 848-304 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C RAHWAY NJ
2020-12-16 864-519 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F CALHOUNFLS SC
2020-12-16 909-828 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 UPLAND CA
2020-12-16 909-940 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2020-12-16 909-943 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 S BERNDINO CA
2020-12-16 909-956 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 S BERNDINO CA
2020-12-16 909-960 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 UPLAND CA
2020-12-16 939-749 0XXX1XXX4XXX7XXX · 4 holders which blocks → NEUTRAL TANDEM - PR 559F COAMO PR
2020-12-16 939-759 0–9 XXXall 10 · 2 holders which blocks → NEUTRAL TANDEM - PR 559F SANTURCE PR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.