NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2011-02-18 347-896 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN15 NY
2011-02-18 347-897 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN13 NY
2011-02-18 507-800 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E JACKSON MN
2011-02-18 561-412 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2011-02-18 561-855 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E WPALMBEACH FL
2011-02-18 615-492 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C VANLEER TN
2011-02-18 615-798 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7977 FRANKLIN TN
2011-02-18 773-993 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-02-18 914-267 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WSCHSTZN01 NY
2011-02-18 914-268 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WSCHSTZN02 NY
2011-02-18 914-278 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E WSCHSTZN03 NY
2011-02-18 914-279 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 WSCHSTZN04 NY
2011-02-18 929-200 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 NWYRCYZN09 NY
2011-02-18 954-800 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E CORAL SPG FL
2011-02-17 217-298 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C CHAMPAURBN IL
2011-02-17 218-600 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MN 184D DULUTH MN
2011-02-17 219-200 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 GARY IN
2011-02-17 309-200 0–9 XXXall 10 · 3 holders which blocks → YMAX COMMUNICATIONS CORP. - IL 259E BLOOMINGTN IL
2011-02-17 320-497 0XXX4XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC - MN 184D ST CLOUD MN
2011-02-17 347-815 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN12 NY
2011-02-17 406-318 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MT 453F BILLINGS MT
2011-02-17 434-282 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E CHARLOTSVL VA
2011-02-17 443-358 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → YMAX COMMUNICATIONS CORP. - MD 281E SALISBURY MD
2011-02-17 470-214 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2011-02-17 507-200 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OWATONNA MN
2011-02-17 573-525 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C CAMDENTON MO
2011-02-17 618-300 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C CARBONDALE IL
2011-02-17 715-901 0XXX1XXX3XXX4XXX which blocks → ONVOY, LLC - WI 225C EAU CLAIRE WI
2011-02-17 757-913 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NWPTNWSZN1 VA
2011-02-17 757-921 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 NWPTNWSZN1 VA
2011-02-17 765-200 0–9 XXXall 10 · 4 holders which blocks → YMAX COMMUNICATIONS CORP. - IN 352E RICHMOND IN
2011-02-17 779-300 0XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ROCKFORD IL
2011-02-17 779-400 0–9 XXXall 10 · 5 holders which blocks → YMAX COMMUNICATIONS CORP. - IL 259E DE KALB IL
2011-02-17 786-475 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E MIAMI FL
2011-02-17 803-307 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATESBURG SC
2011-02-17 812-297 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D EVANSVILLE IN
2011-02-17 910-779 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FAYETTEVL NC
2011-02-17 912-439 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 ST MARYS GA
2011-02-17 912-464 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ST MARYS GA
2011-02-17 919-322 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RALEIGH NC
2011-02-17 919-348 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E RALEIGH NC
2011-02-17 939-280 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-288 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-289 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-290 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-400 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-401 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-402 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-403 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-17 939-404 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.