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
2021-10-19 572-204 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2021-10-19 579-356 not yet reported which blocks → 9164-3122 Quebec inc 843D Ste-Victoire —
2021-10-19 581-210 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Black Lake —
2021-10-19 581-413 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Leeds —
2021-10-19 581-414 not yet reported which blocks → IVIC Telecom s.e.n.c 817D East Broughton —
2021-10-19 581-415 not yet reported which blocks → IVIC Telecom s.e.n.c 817D St-Methode-de-Frontenac —
2021-10-19 581-416 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Tring Jonction —
2021-10-19 581-417 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Stratford —
2021-10-19 629-268 0XXX1XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F EAGLEVILLE TN
2021-10-19 660-280 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 KIRKSVILLE MO
2021-10-19 779-339 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRANKFORT IL
2021-10-19 848-320 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DUNELLEN NJ
2021-10-19 863-315 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 LAKELAND FL
2021-10-19 920-414 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WI 225C NEENAH WI
2021-10-19 920-534 0XXX1XXX2XXX8XXX · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - WI 841H ABRAMS WI
2021-10-19 945-226 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RED OAK TX
2021-10-19 947-242 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C W BLOOMFLD MI
2021-10-18 470-864 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CEDARTOWN GA
2021-10-18 579-548 not yet reported which blocks → Cooptel 818D Sorel —
2021-10-18 681-391 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRKRSBGZN1 WV
2021-10-18 681-410 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN2 WV
2021-10-18 737-306 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUTTO TX
2021-10-18 762-332 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 COLUMBUS GA
2021-10-18 825-907 not yet reported which blocks → Iristel Inc. 154E Fox Creek —
2021-10-18 838-262 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C TROY NY
2021-10-18 865-421 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MARYVILLE TN
2021-10-18 971-414 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 STFRD-SNDY OR
2021-10-15 206-759 0–9 XXXall 10 · 3 holders which blocks → AT&T - LOCAL 7421 BAINBDG IS WA
2021-10-15 262-382 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 THIENSVL WI
2021-10-15 269-361 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BATTLE CRK MI
2021-10-15 269-378 2XXX7XXX8XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HASTINGS MI
2021-10-15 331-279 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J ELMHURST IL
2021-10-15 341-206 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-10-15 364-210 0XXX1XXX8XXX9XXX · 4 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C PRINCETON KY
2021-10-15 365-730 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2021-10-15 365-731 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2021-10-15 365-732 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2021-10-15 480-810 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-10-15 517-302 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2021-10-15 520-699 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SIERRAVIST AZ
2021-10-15 629-267 0–9 XXXall 10 · 4 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 MURFREESBO TN
2021-10-15 715-991 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 STEVENS PT WI
2021-10-15 725-262 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 LAS VEGAS NV
2021-10-15 762-330 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MONTICELLO GA
2021-10-15 854-803 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H FOLLYBEACH SC
2021-10-15 854-839 0XXX1XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SULLIVNSIS SC
2021-10-15 854-864 0XXX1XXX2XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ISLE PALMS SC
2021-10-15 854-910 0XXX1XXX2XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H YEMASSEE SC
2021-10-15 872-871 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 CHICGOZN01 IL
2021-10-15 873-251 not yet reported which blocks → 9164-3122 Quebec inc 843D Notre-Dame-du-Bon-Conseil —

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.