NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2011-02-01 819-744 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2011-02-01 914-254 0–9 XXXwhole prefix which blocks → VERIZON NEW YORK, INC. 9104 WSCHSTZN07 NY
2011-02-01 917-737 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN03 NY
2011-02-01 939-292 0–9 XXXwhole prefix which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J LEVITTOWN PR
2011-02-01 940-600 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DENTON TX
2011-01-31 225-600 6XXX9XXX · 2 holders which blocks → ADVANCED TEL., INC. - LA 8839 MAUREPAS LA
2011-01-31 414-233 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-01-31 414-484 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-01-31 414-499 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-01-31 414-739 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-01-31 443-800 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-01-31 567-538 not yet reported which blocks → GLANDORF TELEPHONE COMPANY, INC. - OH 359G OTTAWA OH
2011-01-31 587-938 not yet reported which blocks → Fido Solutions Inc. 5643 Edmonton —
2011-01-31 587-968 not yet reported which blocks → Fido Solutions Inc. 5643 Calgary —
2011-01-31 778-933 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Chilliwack —
2011-01-31 778-936 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Duncan —
2011-01-31 801-970 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-01-31 956-336 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNSVL TX
2011-01-28 203-717 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K GREENWICH CT
2011-01-28 347-793 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2011-01-28 470-202 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 BUFORD GA
2011-01-28 514-419 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2011-01-28 516-406 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 NASSAUZN02 NY
2011-01-28 581-741 not yet reported which blocks → Videotron Ltd. 8306 Quebec —
2011-01-28 604-446 not yet reported which blocks → Videotron Ltd. 383F Vancouver —
2011-01-28 647-909 not yet reported which blocks → Videotron Ltd. 383F Toronto —
2011-01-27 435-525 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ST GEORGE UT
2011-01-27 801-980 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F AMERCNFORK UT
2011-01-27 804-933 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 RICHMOND VA
2011-01-26 248-285 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PONTIAC MI
2011-01-26 408-680 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2011-01-26 479-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAVETTE AR
2011-01-26 516-405 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN03 NY
2011-01-26 973-861 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PASSAIC NJ
2011-01-25 323-412 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2011-01-25 360-975 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2011-01-25 412-737 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-01-25 414-239 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2011-01-25 438-391 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2011-01-25 514-742 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2011-01-25 559-384 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C BURREL CA
2011-01-25 724-672 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 GREENSBURG PA
2011-01-25 769-264 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C OSYKA MS
2011-01-25 807-444 not yet reported which blocks → Bell Mobility 6574 Kenora —
2011-01-25 831-453 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C CASTROVL CA
2011-01-25 909-302 0–9 XXXall 10 · 5 holders which blocks → PACIFIC BELL 9740 FONTANA CA
2011-01-25 918-644 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2011-01-24 614-427 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH
2011-01-21 226-207 not yet reported which blocks → TELUS Integrated Communications 2782 Harrow —
2011-01-21 469-600 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.