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
2013-09-03 579-251 not yet reported which blocks → TELUS Quebec 2243 St-Eustache —
2013-09-03 587-618 not yet reported which blocks → TELUS 8084 Slave Lake —
2013-09-03 908-801 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 SOMERVILLE NJ
2013-08-30 402-702 0–9 XXXwhole prefix which blocks → INTRADO COMMUNICATIONS, LLC 826C OMAHA NE
2013-08-30 585-215 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 WYOMING NY
2013-08-30 720-405 0–9 XXXwhole prefix which blocks → INTRADO COMMUNICATIONS, LLC 809C DENVER CO
2013-08-29 216-801 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2013-08-29 316-803 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 NEWTON KS
2013-08-29 336-296 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 KING NC
2013-08-29 561-425 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J WPALMBEACH FL
2013-08-29 571-284 0–9 XXXall 10 · 3 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HAYMARKET VA
2013-08-29 615-381 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7977 NASHVILLE TN
2013-08-29 910-899 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J WILMINGTON NC
2013-08-28 385-288 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 OGDEN UT
2013-08-28 586-324 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2013-08-28 586-494 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2013-08-28 682-803 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WEATHERFD TX
2013-08-28 808-200 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HONOLULU HI
2013-08-28 808-378 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LIHUE HI
2013-08-28 808-498 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HILO HI
2013-08-28 808-868 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WAILUKU HI
2013-08-28 832-993 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2013-08-27 216-808 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2013-08-27 317-864 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2013-08-27 541-901 0–9 XXXall 10 · 8 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J FLORENCE OR
2013-08-27 713-766 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HOUSTON TX
2013-08-27 818-722 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFN SPLV CA
2013-08-26 806-309 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LUBBOCK TX
2013-08-26 818-853 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C NO HOLLYWD CA
2013-08-26 832-674 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C LANGHAMCRK TX
2013-08-26 865-203 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KNOXVILLE TN
2013-08-26 901-424 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F SOMERVILLE TN
2013-08-26 913-260 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2013-08-26 971-473 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEAVERTON OR
2013-08-23 207-303 0–9 XXXall 10 · 5 holders which blocks → OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS 5205 SCARBOROGH ME
2013-08-23 267-774 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN3 PA
2013-08-23 308-248 0–9 XXXall 10 · 7 holders which blocks → GLENWOOD TELECOMMUNICATIONS, INC. - NE 885E HOLDREGE NE
2013-08-23 470-227 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J CARTERSVL GA
2013-08-23 480-404 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2013-08-23 581-334 not yet reported which blocks → Telecommunications Xittel Inc 247F Matane —
2013-08-23 581-335 not yet reported which blocks → Telecommunications Xittel Inc 247F Amqui —
2013-08-23 581-336 not yet reported which blocks → Telecommunications Xittel Inc 247F Val-Brillant —
2013-08-23 581-338 not yet reported which blocks → Telecommunications Xittel Inc 247F Sainte-Anne-des-Monts —
2013-08-23 581-340 not yet reported which blocks → Telecommunications Xittel Inc 247F Saint-Ulric —
2013-08-23 581-341 not yet reported which blocks → Telecommunications Xittel Inc 247F Saint-Rene-de-Matane —
2013-08-23 581-342 not yet reported which blocks → Telecommunications Xittel Inc 247F Saint-Leon-le-Grand —
2013-08-23 581-344 not yet reported which blocks → Telecommunications Xittel Inc 247F Sainte-Felicite —
2013-08-23 581-345 not yet reported which blocks → Telecommunications Xittel Inc 247F Sayabec —
2013-08-23 581-347 not yet reported which blocks → Telecommunications Xittel Inc 247F Mont-Louis —
2013-08-23 581-600 not yet reported which blocks → Videotron Ltd. 8306 Esprit-Saint —

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.