NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2013-06-13 224-806 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ELGIN IL
2013-06-13 323-484 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LSAN DA 06 CA
2013-06-13 323-536 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LSAN DA 14 CA
2013-06-13 424-302 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BEVERLYHLS CA
2013-06-13 657-223 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ORANGE CA
2013-06-13 708-506 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2013-06-13 708-580 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2013-06-13 747-226 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CANOGAPARK CA
2013-06-13 818-938 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RESEDA CA
2013-06-12 202-971 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WSHNGTNZN1 DC
2013-06-12 224-804 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E DEERFIELD IL
2013-06-12 226-308 not yet reported which blocks → Quadro Communications Co-operative Inc. 004G Ilderton —
2013-06-12 313-265 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2013-06-12 405-402 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2013-06-12 405-835 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2013-06-12 413-801 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2013-06-12 581-420 not yet reported which blocks → Videotron Ltd. 8306 Beauceville —
2013-06-12 702-832 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2013-06-12 720-415 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2013-06-12 720-557 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2013-06-12 774-801 0–9 XXXall 10 · 8 holders which blocks → COMCAST IP PHONE, LLC 318J ORLEANS MA
2013-06-12 805-663 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K OXNARD CA
2013-06-12 813-456 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-12 909-453 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K S BERNDINO CA
2013-06-12 951-379 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MORENO CA
2013-06-12 971-801 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2013-06-11 226-851 not yet reported which blocks → TELUS Integrated Communications 2782 Brantford —
2013-06-11 226-852 not yet reported which blocks → TELUS Integrated Communications 2782 Stratford —
2013-06-11 253-244 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-06-11 289-538 not yet reported which blocks → TELUS Integrated Communications 2782 Richmond Hill —
2013-06-11 343-355 not yet reported which blocks → TELUS Integrated Communications 2782 Belleville —
2013-06-11 343-356 not yet reported which blocks → TELUS Integrated Communications 2782 Cornwall —
2013-06-11 431-483 not yet reported which blocks → TELUS Integrated Communications 2782 Brandon —
2013-06-11 431-484 not yet reported which blocks → TELUS Integrated Communications 2782 Selkirk —
2013-06-11 431-485 not yet reported which blocks → TELUS Integrated Communications 2782 Winnipeg —
2013-06-11 506-980 not yet reported which blocks → TELUS Integrated Communications 2782 Moncton —
2013-06-11 506-981 not yet reported which blocks → TELUS Integrated Communications 2782 Fredericton —
2013-06-11 506-982 not yet reported which blocks → TELUS Integrated Communications 2782 Saint John —
2013-06-11 612-255 0–9 XXXall 10 · 3 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 4139 TWINCITIES MN
2013-06-11 802-336 2XXX6XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J RICHMOND VT
2013-06-11 802-539 2XXX which blocks → COMCAST IP PHONE, LLC 318J CHARLOTTE VT
2013-06-11 802-643 2XXX which blocks → COMCAST IP PHONE, LLC 318J BRISTOL VT
2013-06-11 802-799 2XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J HINESBURG VT
2013-06-11 802-926 2XXX which blocks → COMCAST IP PHONE, LLC 318J WEYBRIDGE VT
2013-06-11 816-800 0–9 XXXall 10 · 6 holders which blocks → AVID COMMUNICATIONS, LLC - MO 718D KANSASCITY MO
2013-06-11 862-801 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F BUTLER NJ
2013-06-10 415-802 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2013-06-10 619-452 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNDG SNDG CA
2013-06-10 754-210 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 HOLLYWOOD FL
2013-06-10 765-229 0XXX1XXX2XXX4XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K UNION CITY IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.