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
2020-08-20 365-943 not yet reported which blocks → TekSavvy Solutions Inc 548H Niagara-On-The-Lake —
2020-08-20 365-944 not yet reported which blocks → TekSavvy Solutions Inc 548H Pelham —
2020-08-20 365-945 not yet reported which blocks → TekSavvy Solutions Inc 548H Port Colborne —
2020-08-20 365-946 not yet reported which blocks → TekSavvy Solutions Inc 548H Port Robinson —
2020-08-20 365-947 not yet reported which blocks → TekSavvy Solutions Inc 548H Ridgeway —
2020-08-20 386-348 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FLAGLERBCH FL
2020-08-20 386-678 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H LIVE OAK FL
2020-08-20 414-812 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN1 WI
2020-08-20 534-600 0XXX1XXX4XXX6XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H THREELAKES WI
2020-08-20 534-900 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PICKEREL WI
2020-08-20 561-527 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2020-08-20 602-731 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2020-08-20 616-766 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BELDING MI
2020-08-20 689-356 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H EASTORANGE FL
2020-08-20 727-349 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C CLEARWATER FL
2020-08-20 727-353 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D STPETERSBG FL
2020-08-20 734-499 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ROMULUS MI
2020-08-20 734-966 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H LOSTPNNSUL MI
2020-08-20 786-330 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2020-08-19 218-542 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 GRAND RPDS MN
2020-08-19 239-429 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C NAPLES FL
2020-08-19 239-499 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNCPVISNDS FL
2020-08-19 270-800 0XXX8XXX which blocks → FRACTEL, LLC 965H WESTPLAINS KY
2020-08-19 313-512 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN4 MI
2020-08-19 346-433 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HSTNSUBURB TX
2020-08-19 346-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H STAFFORD TX
2020-08-19 364-200 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H JORDAN KY
2020-08-19 430-345 1XXX2XXX4XXX6XXX · 4 holders which blocks → FRACTEL, LLC 965H EUSTACE TX
2020-08-19 463-241 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F GREENFIELD IN
2020-08-19 606-345 6XXX which blocks → FRACTEL, LLC 965H HAROLD KY
2020-08-19 606-400 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WILLIAMSBG KY
2020-08-19 606-500 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H WALLINSCRK KY
2020-08-19 606-900 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H RUSSELL KY
2020-08-19 612-449 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2020-08-19 629-243 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J NASHVILLE TN
2020-08-19 720-741 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D GEORGETOWN CO
2020-08-19 720-802 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CO 026D FORTLUPTON CO
2020-08-19 754-354 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C FTLAUDERDL FL
2020-08-19 813-593 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2020-08-19 857-281 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-08-19 859-946 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H KIRKSVILLE KY
2020-08-19 863-345 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LAKELAND FL
2020-08-19 865-371 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J KNOXVILLE TN
2020-08-19 956-556 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LOSFRESNOS TX
2020-08-19 989-933 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MTPLEASANT MI
2020-08-18 209-687 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 STOCKTON CA
2020-08-18 319-308 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 FT MADISON IA
2020-08-18 365-576 not yet reported which blocks → TekSavvy Solutions Inc 548H Brampton —
2020-08-18 365-577 not yet reported which blocks → TekSavvy Solutions Inc 548H Caledon East —
2020-08-18 365-578 not yet reported which blocks → TekSavvy Solutions Inc 548H Castlemore —

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.