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
2011-06-14 217-210 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E SPRINGFLD IL
2011-06-14 217-281 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHAMPAURBN IL
2011-06-14 309-306 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E PEORIA IL
2011-06-14 347-991 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN07 NY
2011-06-14 415-523 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2011-06-14 516-493 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN05 NY
2011-06-14 574-290 1XXX2XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KEWANNA IN
2011-06-14 856-230 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 MULLICA HL NJ
2011-06-13 201-268 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JERSEYCITY NJ
2011-06-13 234-222 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F DALTON OH
2011-06-13 385-225 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2011-06-13 385-227 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2011-06-13 475-227 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2011-06-13 504-230 0–9 XXXall 10 · 6 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-06-13 505-226 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ALBUQURQUE NM
2011-06-13 505-273 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2011-06-13 513-384 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2011-06-13 702-305 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAS VEGAS NV
2011-06-13 708-537 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-06-13 720-326 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2011-06-13 757-347 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CHUCKATUCK VA
2011-06-13 786-292 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E MIAMI FL
2011-06-13 816-269 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY MO
2011-06-13 872-230 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-06-13 913-235 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2011-06-13 919-263 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E WAKEFOREST NC
2011-06-13 970-286 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FT COLLINS CO
2011-06-13 971-263 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2011-06-10 219-237 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF INDIANA, LLC - IN 279F HIGHLAND IN
2011-06-10 317-296 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2011-06-10 413-799 0–9 XXXall 10 · 2 holders which blocks → CRC COMMUNICATIONS OF MAINE, INC. - MA 236F SPRINGFLD MA
2011-06-10 609-358 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F TRENTON NJ
2011-06-10 716-391 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E LANCASTER NY
2011-06-10 803-297 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COLUMBIA SC
2011-06-09 226-213 not yet reported which blocks → Distributel 082E London —
2011-06-09 226-214 not yet reported which blocks → Distributel 082E Kitchener-Waterloo —
2011-06-09 289-948 not yet reported which blocks → Distributel 082E Brampton —
2011-06-09 289-949 not yet reported which blocks → Distributel 082E Hamilton —
2011-06-09 347-978 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN05 NY
2011-06-09 406-361 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 HAMILTON MT
2011-06-09 414-388 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-06-09 518-662 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E GREENVILLE NY
2011-06-09 540-627 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROANOKE VA
2011-06-09 575-315 0–9 XXXall 10 · 6 holders which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 RUIDOSO NM
2011-06-09 587-687 not yet reported which blocks → Distributel 081E Edmonton —
2011-06-09 587-688 not yet reported which blocks → Distributel 081E Edmonton —
2011-06-09 631-464 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E AMITYVILLE NY
2011-06-09 778-746 not yet reported which blocks → Distributel 081E Victoria —
2011-06-09 786-233 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E MIAMI FL
2011-06-09 786-241 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL

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.