NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
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
2010-06-02 216-282 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F CLEVELAND OH
2010-06-02 217-517 2XXX3XXX6XXX7XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 JACKSONVL IL
2010-06-02 270-894 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HENDERSON KY
2010-06-02 561-318 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2010-06-02 614-407 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F COLUMBUS OH
2010-06-02 754-227 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 DEERFLDBCH FL
2010-06-02 772-267 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PTST LUCIE FL
2010-06-02 774-338 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SAGAMORE MA
2010-06-02 786-445 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2010-06-02 954-393 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 FTLAUDERDL FL
2010-06-02 954-417 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HOLLYWOOD FL
2010-06-01 347-355 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN08 NY
2010-06-01 347-356 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN07 NY
2010-06-01 347-357 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN11 NY
2010-06-01 347-358 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN10 NY
2010-06-01 347-359 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NWYRCYZN07 NY
2010-06-01 347-360 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NWYRCYZN03 NY
2010-06-01 404-772 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2010-06-01 407-680 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2010-06-01 484-626 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F BETHLEHEM PA
2010-06-01 540-508 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J STEPHENSCY VA
2010-06-01 601-496 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 JACKSON MS
2010-06-01 608-777 0–9 XXXwhole prefix which blocks → MT. VERNON TEL. CO. 0917 VERONA WI
2010-06-01 631-336 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BRENTWOOD NY
2010-06-01 681-200 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CAS COMMUNICATIONS, LLC - WV 875F PRKRSBGZN2 WV
2010-06-01 757-701 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NRFOLKZON2 VA
2010-06-01 757-828 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F NRFOLKZON2 VA
2010-06-01 801-901 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F LEHI UT
2010-06-01 859-446 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COVINGTON KY
2010-06-01 916-757 0–9 XXXall 10 · 3 holders which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2010-06-01 928-325 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SEDONA AZ
2010-06-01 970-541 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 LOVELAND CO
2010-05-28 276-207 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J NORTON VA
2010-05-28 423-226 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F CHURCHHILL TN
2010-05-28 435-243 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 TOOELE UT
2010-05-28 701-972 none assigned yet which blocks → MIDCONTINENT COMMUNICATIONS - ND 3065 NEW ROCKFD ND
2010-05-28 845-217 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E SAUGERTIES NY
2010-05-28 845-218 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E WAPIGRSFLS NY
2010-05-28 914-228 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E KATONAH NY
2010-05-27 289-799 not yet reported which blocks → Iristel Inc. 154E Hamilton —
2010-05-27 323-237 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
2010-05-27 323-984 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2010-05-27 514-647 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2010-05-27 516-323 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN06 NY
2010-05-27 613-699 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2010-05-27 615-927 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2010-05-27 657-207 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D ANAHEIM CA
2010-05-26 201-580 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2010-05-26 201-687 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 JERSEYCITY NJ
2010-05-26 215-987 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHLDLPHZN3 PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.