NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-03-23 786-494 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2016-03-23 804-206 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA 7238 DINWIDDIE VA
2016-03-23 828-827 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E CLAREMONT NC
2016-03-23 850-204 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C HOLLEYNVRR FL
2016-03-23 864-778 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - SC 548E WALHALLA SC
2016-03-23 907-204 0XXX1XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS 6563 KETCHIKAN AK
2016-03-23 940-310 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - TX 903C TIOGA TX
2016-03-23 978-581 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MA 892D ORANGE MA
2016-03-22 220-270 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C CROTON OH
2016-03-22 231-277 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C FOUNTAIN MI
2016-03-22 231-771 0XXX1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C ELK RAPIDS MI
2016-03-22 254-278 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 COPPERASCV TX
2016-03-22 515-750 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - IA 221F DAWSON IA
2016-03-22 520-597 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E SUPERIOR AZ
2016-03-22 570-979 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILLIAMSPT PA
2016-03-22 574-319 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IN 097D TWELVEMILE IN
2016-03-22 575-727 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NM 206F BAYARD NM
2016-03-22 575-735 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - NM 206F CIMARRON NM
2016-03-22 587-502 not yet reported which blocks → Distributel 081E Acme —
2016-03-22 587-503 not yet reported which blocks → Distributel 081E Airdrie —
2016-03-22 587-504 not yet reported which blocks → Distributel 081E Arrowwood —
2016-03-22 587-505 not yet reported which blocks → Distributel 081E Banff —
2016-03-22 587-506 not yet reported which blocks → Distributel 081E Beiseker —
2016-03-22 587-508 not yet reported which blocks → Distributel 081E Blackie —
2016-03-22 587-509 not yet reported which blocks → Distributel 081E Bragg Creek —
2016-03-22 587-510 not yet reported which blocks → Distributel 081E Canmore —
2016-03-22 587-512 not yet reported which blocks → Distributel 081E Carstairs —
2016-03-22 587-513 not yet reported which blocks → Distributel 081E Cayley —
2016-03-22 623-213 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-03-22 657-313 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SANTA ANA CA
2016-03-22 657-377 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CA 649C GARDEN GRV CA
2016-03-22 712-530 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - IA 221F EMERSON IA
2016-03-22 731-497 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - TN 525E RIDGELY TN
2016-03-22 812-561 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D JASONVILLE IN
2016-03-22 848-277 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NJ 637C SEASIDE PK NJ
2016-03-22 863-220 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 LAKELAND FL
2016-03-22 939-222 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2016-03-22 949-339 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LAGUNA BCH CA
2016-03-22 985-239 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E MT HERMON LA
2016-03-21 431-280 not yet reported which blocks → Westman Media Cooperative Ltd 120F Minitonas —
2016-03-21 442-203 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C BRIDGEPORT CA
2016-03-21 475-230 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 NEW HAVEN CT
2016-03-21 502-306 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - KY 896E PORT ROYAL KY
2016-03-21 506-975 not yet reported which blocks → TELUS Integrated Communications 2782 Oromocto —
2016-03-21 531-355 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OMAHA NE
2016-03-21 579-205 not yet reported which blocks → TELUS Quebec 2243 Yamaska —
2016-03-21 579-206 not yet reported which blocks → TELUS Quebec 2243 Pierreville —
2016-03-21 579-207 not yet reported which blocks → TELUS Quebec 2243 St-Barthelemy —
2016-03-21 579-208 not yet reported which blocks → TELUS Quebec 2243 Berthierville —
2016-03-21 579-209 not yet reported which blocks → TELUS Quebec 2243 Farnham —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.