NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-09-27 681-517 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LOST RIVER WV
2023-09-27 856-592 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 BRIDGETON NJ
2023-09-27 859-419 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - KY 896E BOONE KY
2023-09-27 872-340 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WIDE VOICE, LLC - IL 395H CHICGOZN04 IL
2023-09-27 913-435 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - KS 205F KANSASCITY KS
2023-09-27 920-934 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 DE PERE WI
2023-09-27 971-464 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E BEAVERTON OR
2023-09-26 213-728 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-09-26 213-729 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2023-09-26 213-734 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2023-09-26 218-664 0XXX1XXX2XXX3XXX4XXX6XXX · 2 holders which blocks → COMMIO, LLC 939H ELY MN
2023-09-26 321-481 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C COCOA FL
2023-09-26 329-205 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NEW CITY NY
2023-09-26 329-206 0XXX2XXX3XXX4XXX · 2 holders which blocks → ONVOY, LLC- NY 384C CROTON FLS NY
2023-09-26 351-550 0XXX1XXX2XXX3XXX4XXX8XXX · 2 holders which blocks → COMMIO, LLC 939H CLINTON MA
2023-09-26 352-825 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WILDWOOD FL
2023-09-26 413-501 0XXX1XXX2XXX3XXX4XXX which blocks → COMMIO, LLC 939H SHEFFIELD MA
2023-09-26 413-503 0XXX1XXX2XXX3XXX4XXX which blocks → COMMIO, LLC 939H WARREN MA
2023-09-26 413-506 0XXX1XXX2XXX3XXX4XXX which blocks → COMMIO, LLC 939H HATFIELD MA
2023-09-26 437-606 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2023-09-26 437-607 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2023-09-26 437-608 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2023-09-26 442-395 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2023-09-26 478-392 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 REYNOLDS GA
2023-09-26 507-897 0XXX1XXX2XXX3XXX4XXX which blocks → COMMIO, LLC 939H BIGELOW MN
2023-09-26 507-971 0XXX1XXX2XXX3XXX4XXX8XXX · 2 holders which blocks → COMMIO, LLC 939H CURRIE MN
2023-09-26 507-973 0XXX1XXX2XXX3XXX4XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H IONA MN
2023-09-26 530-972 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 REDDING CA
2023-09-26 562-707 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NORWALK CA
2023-09-26 564-245 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SILVERDALE WA
2023-09-26 567-428 2XXX which blocks → ONVOY, LLC - OH 464C PIONEER OH
2023-09-26 567-431 2XXX which blocks → ONVOY, LLC - OH 464C CRESTLINE OH
2023-09-26 657-695 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2023-09-26 661-507 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-09-26 708-412 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2023-09-26 725-315 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2023-09-26 743-263 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E BURLINGTON NC
2023-09-26 762-370 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROME GA
2023-09-26 774-550 0XXX1XXX2XXX3XXX4XXX which blocks → COMMIO, LLC 939H AUBURN MA
2023-09-26 774-566 0XXX1XXX2XXX3XXX4XXX which blocks → COMMIO, LLC 939H GRAFTON MA
2023-09-26 775-519 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NV 029F RENO NV
2023-09-26 840-238 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2023-09-26 857-550 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 3 holders which blocks → COMMIO, LLC 939H BELMONT MA
2023-09-26 914-616 2XXX3XXX4XXX5XXX6XXX which blocks → ONVOY, LLC- NY 384C LAKELAND NY
2023-09-26 920-916 6XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 HOWARDSGRV WI
2023-09-26 941-354 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 SARASOTA FL
2023-09-26 951-649 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON CA
2023-09-25 223-339 0–9 XXXall 10 · 4 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 CARLISLE PA
2023-09-25 248-734 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2023-09-25 319-417 0XXX1XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 FT MADISON IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.