NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2011-03-11 513-214 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CINCINNATI OH
2011-03-11 541-275 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F UMATILLA OR
2011-03-11 774-329 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WORCESTER MA
2011-03-10 201-275 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2011-03-10 201-449 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 HACKENSACK NJ
2011-03-10 202-499 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN1 DC
2011-03-10 203-707 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2011-03-10 203-800 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-10 219-344 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 LA PORTE IN
2011-03-10 302-480 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 DOVER DE
2011-03-10 337-226 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 DE RIDDER LA
2011-03-10 443-842 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-03-10 601-920 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 NATCHEZ MS
2011-03-10 616-432 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GRAND RPDS MI
2011-03-10 740-868 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J ZANESVILLE OH
2011-03-10 857-210 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-03-10 857-321 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2011-03-10 860-897 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 HARTFORD CT
2011-03-10 860-993 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 HARTFORD CT
2011-03-10 913-954 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANSASCITY KS
2011-03-10 919-808 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 DURHAM NC
2011-03-10 937-966 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F NO HAMPTON OH
2011-03-10 971-599 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 SALEM OR
2011-03-09 203-999 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-09 226-817 not yet reported which blocks → Mornington Communications Co-operative Ltd. 400E Monkton —
2011-03-09 385-226 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2011-03-09 438-393 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2011-03-09 438-936 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2011-03-09 587-786 not yet reported which blocks → Distributel 081E Edmonton —
2011-03-09 587-794 not yet reported which blocks → Distributel 081E Calgary —
2011-03-09 647-765 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2011-03-09 681-220 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 BECKLEY WV
2011-03-09 980-232 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 CHARLOTTE NC
2011-03-08 662-800 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → IDT AMERICA CORP. - MS 294G BRUCE MS
2011-03-08 816-416 0–9 XXXall 10 · 2 holders which blocks → EVERFAST FIBER NETWORKS LLC 3915 KANSASCITY MO
2011-03-08 816-489 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANSASCITY MO
2011-03-08 832-691 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-03-08 956-685 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PHARR TX
2011-03-07 203-864 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BRIDGEPORT CT
2011-03-07 210-598 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2011-03-07 218-450 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WIKSTROM TELEPHONE COMPANY, INC. - MN 914F ROSEAU MN
2011-03-07 218-635 0XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → WIKSTROM TELEPHONE COMPANY, INC. - MN 914F BAUDETTE MN
2011-03-07 218-853 5XXX7XXX · 2 holders which blocks → WIKSTROM TELEPHONE COMPANY, INC. - MN 914F HALLOCK MN
2011-03-07 218-960 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WIKSTROM TELEPHONE COMPANY, INC. - MN 914F ALVARADO MN
2011-03-07 218-986 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WIKSTROM TELEPHONE COMPANY, INC. - MN 914F WARROAD MN
2011-03-07 225-402 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DUTCH TOWN LA
2011-03-07 315-748 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
2011-03-07 417-413 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD MO
2011-03-07 480-256 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2011-03-07 484-219 0–9 XXXall 10 · 2 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.