NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 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
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
2010-09-24 778-877 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2010-09-24 778-879 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2010-09-24 779-999 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E NEWARK IL
2010-09-24 807-212 not yet reported which blocks → Dryden Municipal Telephone System 8210 Dryden —
2010-09-23 347-619 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN13 NY
2010-09-23 514-503 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2010-09-23 514-506 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2010-09-23 571-358 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MANASSAS VA
2010-09-23 587-230 not yet reported which blocks → TELUS 8084 Calgary —
2010-09-23 587-231 not yet reported which blocks → TELUS 8084 Calgary —
2010-09-23 587-232 not yet reported which blocks → TELUS 8084 Calgary —
2010-09-23 587-233 not yet reported which blocks → TELUS 8084 Calgary —
2010-09-23 780-609 not yet reported which blocks → TELUS 8084 Athabasca —
2010-09-23 939-264 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-23 939-265 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-23 939-266 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-23 939-267 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-23 939-268 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-23 939-269 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-23 939-270 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-23 939-271 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-23 939-272 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-23 939-273 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-09-22 224-999 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2010-09-22 305-707 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E KEYS FL
2010-09-22 309-323 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E PEORIA IL
2010-09-22 325-307 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 ABILENE TX
2010-09-22 331-777 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DOWNERSGRV IL
2010-09-22 331-999 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E OSWEGO IL
2010-09-22 430-222 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 MTPLEASANT TX
2010-09-22 720-431 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2010-09-22 919-706 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C RALEIGH NC
2010-09-22 940-285 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 WICHITAFLS TX
2010-09-22 971-373 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PORTLAND OR
2010-09-21 203-941 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F SEYMOUR CT
2010-09-21 240-402 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-21 270-990 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ELIZABTHTN KY
2010-09-21 334-544 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 MONTGOMERY AL
2010-09-21 516-341 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NASSAUZN03 NY
2010-09-21 857-264 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2010-09-21 860-771 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILLIMNTIC CT
2010-09-21 909-283 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 REDLANDS CA
2010-09-20 210-549 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2010-09-20 347-580 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN11 NY
2010-09-20 347-606 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN13 NY
2010-09-20 404-852 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2010-09-20 425-633 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2010-09-20 450-394 not yet reported which blocks → Videotron Ltd. 8306 Joliette —
2010-09-20 512-614 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2010-09-20 514-508 not yet reported which blocks → Videotron Ltd. 8306 Montreal —

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.