NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2014-05-19 984-223 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E SELMA NC
2014-05-19 984-235 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E WAKEFOREST NC
2014-05-16 267-578 0–9 XXXall 10 · 5 holders which blocks → CALLFIRE, INC. 257H DUBLIN PA
2014-05-16 386-414 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 DELAND FL
2014-05-16 407-717 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 ORLANDO FL
2014-05-16 470-440 0–9 XXXall 10 · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C ATLANTA GA
2014-05-16 559-691 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2014-05-16 561-513 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2014-05-16 586-220 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2014-05-16 586-320 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2014-05-16 586-659 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2014-05-16 720-518 0–9 XXXall 10 · 3 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 DENVER CO
2014-05-16 734-999 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G YPSILANTI MI
2014-05-16 772-217 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 VERO BEACH FL
2014-05-16 859-206 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 COVINGTON KY
2014-05-16 902-797 not yet reported which blocks → Comwave Networks 160G Halifax —
2014-05-16 920-815 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 APPLETON WI
2014-05-16 954-952 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 FTLAUDERDL FL
2014-05-15 204-410 not yet reported which blocks → Comwave Networks 160G Winnipeg —
2014-05-15 204-630 not yet reported which blocks → LES.NET (1996) Inc. 141F Dauphin —
2014-05-15 226-730 not yet reported which blocks → Comwave Networks 160G Brantford —
2014-05-15 226-731 not yet reported which blocks → Comwave Networks 160G Lynden —
2014-05-15 226-732 not yet reported which blocks → Comwave Networks 160G Ohsweken —
2014-05-15 226-733 not yet reported which blocks → Comwave Networks 160G Paris —
2014-05-15 226-734 not yet reported which blocks → Comwave Networks 160G St. George —
2014-05-15 331-801 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 DOWNERSGRV IL
2014-05-15 331-903 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C DOWNERSGRV IL
2014-05-15 516-778 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2014-05-15 587-751 not yet reported which blocks → Comwave Networks 160G St. Albert —
2014-05-15 587-752 not yet reported which blocks → Comwave Networks 160G Grande Prairie —
2014-05-15 646-832 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2014-05-15 647-666 not yet reported which blocks → InnSysVoice Corp 383H Toronto —
2014-05-15 778-781 not yet reported which blocks → Comwave Networks 160G Penticton —
2014-05-15 778-787 not yet reported which blocks → Comwave Networks 160G Nanaimo —
2014-05-15 778-790 not yet reported which blocks → Comwave Networks 160G Vernon —
2014-05-15 858-284 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E DEL MAR CA
2014-05-15 872-254 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2014-05-15 872-307 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2014-05-15 937-563 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PITCHIN OH
2014-05-15 937-870 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWLEBANON OH
2014-05-15 937-888 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SO VIENNA OH
2014-05-15 937-908 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SPRING VLY OH
2014-05-15 937-909 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J FLTCHELENA OH
2014-05-14 234-319 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GREENSBURG OH
2014-05-14 234-404 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ROOTSTOWN OH
2014-05-14 234-978 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HARTVILLE OH
2014-05-14 234-980 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MARLBORO OH
2014-05-14 267-930 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN1 PA
2014-05-14 336-948 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E PROSPECTHL NC
2014-05-14 352-614 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CHIEFLAND FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.