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
2011-05-09 315-892 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM NEW YORK, INC. - FULTON 0106 PHOENIX NY
2011-05-09 315-932 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → WINDSTREAM NEW YORK, INC. - FULTON 0106 MANLIUS NY
2011-05-09 315-962 0–9 XXXall 10 · 4 holders which blocks → WINDSTREAM NEW YORK, INC. - FULTON 0106 CAZENOVIA NY
2011-05-09 315-972 0XXX2XXX3XXX7XXX · 2 holders which blocks → WINDSTREAM NEW YORK, INC. - FULTON 0106 W WINFIELD NY
2011-05-09 347-956 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN09 NY
2011-05-09 347-973 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN03 NY
2011-05-09 347-974 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN04 NY
2011-05-09 347-986 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN06 NY
2011-05-09 424-275 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDONDO CA
2011-05-09 530-881 1XXX8XXX9XXX · 2 holders which blocks → WIDE VOICE, LLC - CA 252F VERDI CA
2011-05-09 559-670 0–9 XXXall 10 · 5 holders which blocks → WIDE VOICE, LLC - CA 252F HANFORD CA
2011-05-09 585-361 0–9 XXXall 10 · 4 holders which blocks → WINDSTREAM NEW YORK, INC. - RED JACKET 0113 SHORTSVL NY
2011-05-09 681-258 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 HEDGESVL WV
2011-05-09 714-659 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2011-05-09 919-897 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J SANFORD NC
2011-05-06 347-931 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN04 NY
2011-05-06 347-937 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN15 NY
2011-05-06 352-403 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WEEKICHSPG FL
2011-05-06 385-202 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2011-05-06 404-908 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2011-05-06 404-994 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2011-05-06 408-389 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNJS SOUTH CA
2011-05-06 501-237 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LONOKE AR
2011-05-06 502-792 0–9 XXXall 10 · 4 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C LOUISVILLE KY
2011-05-06 507-481 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E AUSTIN MN
2011-05-06 516-434 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2011-05-06 516-497 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2011-05-06 720-399 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2011-05-06 765-250 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 LAFAYETTE IN
2011-05-06 778-934 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Parksville —
2011-05-06 778-935 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 New Westminster —
2011-05-06 778-937 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 New Westminster —
2011-05-06 902-952 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 New Glasgow —
2011-05-06 902-953 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Truro —
2011-05-06 954-279 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 FTLAUDERDL FL
2011-05-05 205-549 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F CARBONHILL AL
2011-05-05 347-941 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN06 NY
2011-05-05 504-699 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-05-05 587-720 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Banff —
2011-05-05 587-721 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Bonnyville —
2011-05-05 587-722 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Canmore —
2011-05-05 587-723 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Fort McMurray —
2011-05-05 587-724 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Wainwright —
2011-05-05 613-909 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2011-05-05 620-466 0–9 XXXall 10 · 5 holders which blocks → IDEATEK TELCOM, LLC - KS 014E HAVEN KS
2011-05-05 769-400 not yet reported which blocks → COMCAST IP PHONE, LLC 318J DUFFEE MS
2011-05-04 217-209 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J QUINCY IL
2011-05-04 289-701 not yet reported which blocks → Distributel 082E Oshawa —
2011-05-04 514-819 not yet reported which blocks → Iristel Inc. 154E Montreal —
2011-05-04 647-742 not yet reported which blocks → ISP Telecom Inc. 4727 Toronto —

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.