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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2012-08-27 581-388 not yet reported which blocks → Telecommunications Xittel Inc 247F St-Honore (Chicoutimi Co.) —
2012-08-27 581-389 not yet reported which blocks → Telecommunications Xittel Inc 247F La Baie (Chicoutimi Co.) —
2012-08-27 581-390 not yet reported which blocks → Telecommunications Xittel Inc 247F Anse-St-Jean —
2012-08-27 717-617 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LANCASTER PA
2012-08-27 970-305 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 FT COLLINS CO
2012-08-24 276-209 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BLAND VA
2012-08-24 360-924 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ABERDEEN WA
2012-08-24 484-709 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
2012-08-24 581-382 not yet reported which blocks → Telecommunications Xittel Inc 247F Ferland —
2012-08-24 581-383 not yet reported which blocks → Telecommunications Xittel Inc 247F Jonquiere —
2012-08-24 717-847 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 LANCASTER PA
2012-08-24 816-663 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 KANSASCITY MO
2012-08-24 856-400 0XXX1XXX2XXX4XXX5XXX which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F PORTNORRIS NJ
2012-08-24 856-407 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F PAULSBORO NJ
2012-08-23 207-494 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BIDDEFORD ME
2012-08-23 267-309 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2012-08-23 267-398 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2012-08-23 267-418 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2012-08-23 267-858 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2012-08-23 315-801 0–9 XXXall 10 · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 UTICA NY
2012-08-23 317-619 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2012-08-23 475-205 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J STAMFORD CT
2012-08-23 702-803 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAUGHLIN NV
2012-08-23 813-424 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2012-08-23 850-317 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MARIANNA FL
2012-08-22 204-501 not yet reported which blocks → LES.NET (1996) Inc. 141F Morden —
2012-08-22 204-502 not yet reported which blocks → LES.NET (1996) Inc. 141F Winkler —
2012-08-22 204-503 not yet reported which blocks → LES.NET (1996) Inc. 141F Niverville —
2012-08-22 205-708 0–9 XXXall 10 · 5 holders which blocks → MCC TELEPHONY LLC 593K YORK AL
2012-08-22 240-762 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN2 MD
2012-08-22 249-220 not yet reported which blocks → TELUS Integrated Communications 2782 Stayner —
2012-08-22 249-221 not yet reported which blocks → TELUS Integrated Communications 2782 Alliston —
2012-08-22 249-223 not yet reported which blocks → TELUS Integrated Communications 2782 Moonstone —
2012-08-22 334-609 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY LLC 593K THOMASVL AL
2012-08-22 469-320 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J DALLAS TX
2012-08-22 581-319 not yet reported which blocks → Distributel 083E Quebec —
2012-08-22 613-981 not yet reported which blocks → Videotron Ltd. 787G Ottawa-Hull —
2012-08-22 778-290 not yet reported which blocks → Bell West Inc. 2933 Whalley —
2012-08-22 902-717 not yet reported which blocks → Bell Mobility Aliant 329A Halifax —
2012-08-21 228-231 0–9 XXXall 10 · 3 holders which blocks → MCC TELEPHONY LLC 593K BAYSTLOUIS MS
2012-08-21 267-353 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2012-08-21 281-624 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BAMMEL TX
2012-08-21 401-483 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BRISTOL RI
2012-08-21 602-362 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2012-08-21 602-666 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2012-08-21 608-380 0XXX1XXX6XXX7XXX · 4 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F PRARIDCHIN WI
2012-08-21 608-771 0–9 XXXwhole prefix which blocks → CHARTER IP ENABLED SERVICES, LLC 792K VERONA WI
2012-08-21 734-580 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J DEXTER MI
2012-08-20 201-552 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K UNION CITY NJ
2012-08-20 256-530 0–9 XXXall 10 · 5 holders which blocks → DOVETEL COMMUNICATIONS LLC - AL 799G ANNISTON AL

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.