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
2020-05-14 872-263 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN01 IL
2020-05-14 878-880 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E WASHINGTON PA
2020-05-13 213-442 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 01 CA
2020-05-13 223-235 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E LITTLESTN PA
2020-05-13 223-236 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E MANCHESTER PA
2020-05-13 223-245 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - PA 547E ANNVILLE PA
2020-05-13 272-256 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - PA 547E NEWPHLDLPH PA
2020-05-13 272-261 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E FRACKVILLE PA
2020-05-13 272-271 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E STROUDSBG PA
2020-05-13 272-277 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E MATAMORAS PA
2020-05-13 343-347 not yet reported which blocks → Fibernetics Corporation 464D Arnprior —
2020-05-13 343-348 not yet reported which blocks → Fibernetics Corporation 464D Cumberland —
2020-05-13 343-349 not yet reported which blocks → Fibernetics Corporation 464D Gloucester —
2020-05-13 343-350 not yet reported which blocks → Fibernetics Corporation 464D Orleans —
2020-05-13 343-351 not yet reported which blocks → Fibernetics Corporation 464D Richmond —
2020-05-13 385-340 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J BOUNTIFUL UT
2020-05-13 412-790 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E PTGSBNZN11 PA
2020-05-13 412-866 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PTTSBGZON5 PA
2020-05-13 412-899 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PTTSBGZON3 PA
2020-05-13 412-910 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PTTSBGZON2 PA
2020-05-13 412-990 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PTGSBNZN21 PA
2020-05-13 413-613 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MA 892D DALTON MA
2020-05-13 414-667 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MILWAUKZN5 WI
2020-05-13 434-436 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - VA 138E DRAKESBRCH VA
2020-05-13 438-943 not yet reported which blocks → TELUS Quebec 2243 Montreal —
2020-05-13 438-944 not yet reported which blocks → TELUS Quebec 2243 Montreal —
2020-05-13 442-319 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CALIFORNCY CA
2020-05-13 458-249 0XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHILOQUIN OR
2020-05-13 475-575 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C RIDGEFIELD CT
2020-05-13 478-312 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E WADLEY GA
2020-05-13 650-374 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2020-05-13 774-779 1XXX2XXX3XXX5XXX6XXX · 3 holders which blocks → ONVOY, LLC - MA 892D MARION MA
2020-05-13 785-910 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → WTC COMMUNICATIONS, INC. - KS 460D ALMA KS
2020-05-13 802-902 0XXX1XXX2XXX3XXX8XXX · 3 holders which blocks → ONVOY, LLC - VT 451F BETHEL VT
2020-05-13 857-380 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MA 892D EASTBOSTON MA
2020-05-13 857-858 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MA 892D NEWTON MA
2020-05-13 857-877 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MA 892D BRIGHTON MA
2020-05-13 858-289 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2020-05-13 956-538 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNSVL TX
2020-05-13 959-998 0XXX1XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - CT 639C LYME CT
2020-05-12 205-973 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F DOUBLE SPG AL
2020-05-12 240-728 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D WSNGTNZN10 MD
2020-05-12 251-291 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F MELVIN AL
2020-05-12 336-569 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E DOBSON NC
2020-05-12 360-884 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OLYMPIA WA
2020-05-12 385-346 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2020-05-12 406-990 0XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAME DEER MT
2020-05-12 435-293 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-05-12 516-715 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN09 NY
2020-05-12 516-774 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN06 NY

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.