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
2010-10-25 701-556 6XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STEELE ND
2010-10-25 701-589 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REGENT ND
2010-10-25 701-876 6XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEACH ND
2010-10-25 701-905 0XXX2XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEULAH ND
2010-10-25 765-500 not yet reported which blocks → COMCAST IP PHONE, LLC 318J SHARPSVL IN
2010-10-25 813-455 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPACEN FL
2010-10-25 918-924 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2010-10-25 941-600 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SARASOTA FL
2010-10-22 321-300 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E ORLANDO FL
2010-10-22 518-313 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 COLONIE NY
2010-10-22 518-317 0–9 XXXall 10 · 8 holders which blocks → SLIC NETWORK SOLUTIONS, INC. - NY 193C MALONE NY
2010-10-22 651-600 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2010-10-22 812-200 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F NASHVILLE IN
2010-10-22 812-300 not yet reported which blocks → COMCAST IP PHONE, LLC 318J ELLETTSVL IN
2010-10-22 812-400 not yet reported which blocks → COMCAST IP PHONE, LLC 318J STANFORD IN
2010-10-22 812-500 not yet reported which blocks → COMCAST IP PHONE, LLC 318J SMITHVILLE IN
2010-10-22 812-600 not yet reported which blocks → COMCAST IP PHONE, LLC 318J LYONS IN
2010-10-22 917-397 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN14 NY
2010-10-21 240-500 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J HAGERSTOWN MD
2010-10-21 317-647 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SHERIDAN IN
2010-10-21 321-400 0–9 XXXall 10 · 3 holders which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 ORLANDO FL
2010-10-21 407-777 0–9 XXXall 10 · 3 holders which blocks → FUSION CLOUD SERVICES, LLC 018A ORLANDO FL
2010-10-21 408-645 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNJS WEST CA
2010-10-21 586-277 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NEW HAVEN MI
2010-10-21 606-740 0XXX1XXX5XXX · 3 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LEXINGTON 9690 MOREHEAD KY
2010-10-21 769-325 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C GLOSTER MS
2010-10-21 769-327 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C MAGNOLIA MS
2010-10-21 785-500 7XXX which blocks → NEX-TECH WIRELESS, LLC 122D CAWKERCITY KS
2010-10-21 904-341 0–9 XXXall 10 · 4 holders which blocks → WINDSTREAM FLORIDA, INC. 0336 CALLAHAN FL
2010-10-21 904-800 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 JACKSONVL FL
2010-10-21 954-400 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL 8664 FTLAUDERDL FL
2010-10-20 226-314 not yet reported which blocks → Distributel 082E Guelph —
2010-10-20 234-300 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NO CANTON OH
2010-10-20 234-386 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C MAGNOLWSBG OH
2010-10-20 309-340 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PEORIA IL
2010-10-20 312-477 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN01 IL
2010-10-20 406-305 0XXX1XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WHSLPHRSPG MT
2010-10-20 406-514 0XXX1XXX2XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CULBERTSON MT
2010-10-20 406-956 0XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BAKER MT
2010-10-20 605-551 1XXX5XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRITTON SD
2010-10-20 605-613 0XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLATTE SD
2010-10-20 605-844 4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLARK SD
2010-10-20 605-927 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SISSETON SD
2010-10-20 613-809 not yet reported which blocks → TELUS Mobility 8303 Ottawa-Hull —
2010-10-20 623-428 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2010-10-20 647-253 not yet reported which blocks → TELUS Integrated Communications 2782 Toronto —
2010-10-20 705-414 not yet reported which blocks → Distributel 082E Wawa —
2010-10-20 705-419 not yet reported which blocks → Distributel 082E Sudbury —
2010-10-20 719-445 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J COLORDOSPG CO
2010-10-20 720-808 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO

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.