NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2014-12-24 470-285 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 SOCIALCRCL GA
2014-12-24 470-414 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C NEWNAN GA
2014-12-24 470-705 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA GA
2014-12-24 470-823 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA GA
2014-12-24 475-343 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 MERIDEN CT
2014-12-24 475-689 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2014-12-24 480-579 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2014-12-24 516-344 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN01 NY
2014-12-24 518-676 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C FORT ANN NY
2014-12-24 551-242 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F CLIFFSIDE NJ
2014-12-24 581-635 not yet reported which blocks → TELUS Quebec 8083 Cap-des-Rosiers —
2014-12-24 620-766 0XXX1XXX2XXX4XXX6XXX7XXX · 6 holders which blocks → NEX-TECH WIRELESS, LLC 122D COUNCILGRV KS
2014-12-24 657-262 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D ANAHEIM CA
2014-12-24 660-951 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E SEDALIA MO
2014-12-24 661-497 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 BKFD MAIN CA
2014-12-24 667-251 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 TOWSON MD
2014-12-24 669-258 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MORGANHILL CA
2014-12-24 701-801 0–9 XXXall 10 · 2 holders which blocks → WIDE VOICE, LLC - ND 744G BISMARCK ND
2014-12-24 705-903 not yet reported which blocks → Bell Mobility 6574 Barrie —
2014-12-24 737-201 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C TAYLOR TX
2014-12-24 803-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E COLUMBIA SC
2014-12-24 813-559 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPACEN FL
2014-12-24 909-676 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D RIALTO CA
2014-12-24 914-340 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C CHAPPAQUA NY
2014-12-24 914-344 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C KATONAH NY
2014-12-24 914-867 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC- NY 384C BEDFORDVLG NY
2014-12-24 915-314 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F VINTON TX
2014-12-24 980-689 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E DAVIDSON NC
2014-12-23 213-352 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 10 CA
2014-12-23 215-372 0–9 XXXall 10 · 5 holders which blocks → INTRADO COMMUNICATIONS, LLC 835C PHLDLPHZN1 PA
2014-12-23 218-228 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MN 184D SABIN MN
2014-12-23 254-321 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BURLINGTON TX
2014-12-23 323-738 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2014-12-23 323-891 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2014-12-23 331-308 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E BARTLETT IL
2014-12-23 346-215 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C ALVIN TX
2014-12-23 385-645 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-12-23 430-212 2XXX7XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J FROST TX
2014-12-23 443-961 0–9 XXXall 10 · 3 holders which blocks → INTRADO COMMUNICATIONS, LLC 820C BALTIMORE MD
2014-12-23 469-709 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J DALLAS TX
2014-12-23 475-619 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 STAMFORD CT
2014-12-23 520-809 0–9 XXXall 10 · 5 holders which blocks → INTRADO COMMUNICATIONS, LLC 890G TUCSON AZ
2014-12-23 567-406 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C WHITEHOUSE OH
2014-12-23 579-337 not yet reported which blocks → Bell Mobility 6574 Joliette —
2014-12-23 581-525 not yet reported which blocks → Bell Mobility 6574 Rimouski —
2014-12-23 587-460 not yet reported which blocks → TELUS 8084 Edmonton —
2014-12-23 602-554 0–9 XXXall 10 · 3 holders which blocks → INTRADO COMMUNICATIONS, LLC 890G PHOENIX AZ
2014-12-23 608-747 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 7 holders which blocks → ONVOY, LLC - WI 225C MAUSTON WI
2014-12-23 681-842 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 BRIDGEPORT WV
2014-12-23 717-913 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SHIPPENSBG PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.