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
2010-10-07 832-500 0–9 XXXall 10 · 7 holders which blocks → WINDSTREAM SUGAR LAND, LLC 2147 SUGAR LAND TX
2010-10-06 256-269 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DADEVILLE AL
2010-10-06 262-409 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 WAUKESHA WI
2010-10-06 323-380 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2010-10-06 347-771 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN08 NY
2010-10-06 484-522 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2010-10-06 518-400 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ROUND LAKE NY
2010-10-06 518-403 0XXX1XXX4XXX5XXX7XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LK LUZERNE NY
2010-10-06 575-343 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 HATCH NM
2010-10-06 630-796 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E DOWNERSGRV IL
2010-10-06 847-796 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E LAKEZURICH IL
2010-10-06 909-285 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E UPLAND CA
2010-10-06 913-617 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2010-10-05 206-430 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SEATTLE WA
2010-10-05 289-219 not yet reported which blocks → Bell Mobility 6574 St. Catharines-Thorold —
2010-10-05 289-387 not yet reported which blocks → Bell Mobility 6574 Ajax-Pickering —
2010-10-05 602-247 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7175 PHOENIX AZ
2010-10-05 604-355 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2010-10-05 646-493 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2010-10-05 646-494 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2010-10-05 708-501 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2010-10-05 778-363 not yet reported which blocks → Bell Mobility 6574 Kelowna —
2010-10-05 917-341 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN09 NY
2010-10-05 917-382 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN08 NY
2010-10-05 917-383 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN04 NY
2010-10-04 224-276 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ELGIN IL
2010-10-04 240-200 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2010-10-04 269-338 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E BENTON HBR MI
2010-10-04 289-681 not yet reported which blocks → TELUS Mobility 8303 Oakville —
2010-10-04 347-389 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN05 NY
2010-10-04 480-428 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX AZ
2010-10-04 587-220 not yet reported which blocks → TELUS Mobility 8301 Lethbridge —
2010-10-04 647-855 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2010-10-04 647-858 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2010-10-04 647-870 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2010-10-04 647-871 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2010-10-04 732-902 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K METUCHEN NJ
2010-10-04 763-270 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J TWINCITIES MN
2010-10-04 819-708 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2010-10-04 917-200 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN07 NY
2010-10-04 917-300 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN10 NY
2010-10-04 917-310 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN06 NY
2010-10-04 917-336 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN07 NY
2010-10-04 918-505 0–9 XXXall 10 · 6 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
2010-10-04 919-666 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 DURHAM NC
2010-10-01 204-390 not yet reported which blocks → MTS Inc. 991B Winnipeg —
2010-10-01 408-471 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNJS NORTH CA
2010-10-01 450-386 not yet reported which blocks → ISP Telecom Inc. 4727 Joliette —
2010-10-01 571-210 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2010-10-01 587-983 not yet reported which blocks → TELUS Mobility 8301 Edmonton —

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.