NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
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
2014-01-15 346-888 0–9 XXXall 10 · 5 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D HSTNSUBURB TX
2014-01-15 581-215 not yet reported which blocks → Sogetel Inc. 8237 Lac-Etchemin —
2014-01-15 857-701 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2014-01-15 902-589 not yet reported which blocks → TELUS Integrated Communications 2782 Windsor —
2014-01-15 902-590 not yet reported which blocks → TELUS Integrated Communications 2782 Sydney —
2014-01-15 902-591 not yet reported which blocks → TELUS Integrated Communications 2782 Sheet Harbour —
2014-01-14 252-284 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → CSC VOICE, LLC 612K ROBERSONVL NC
2014-01-14 252-582 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K LA GRANGE NC
2014-01-14 252-662 0XXX1XXX2XXX3XXX6XXX · 4 holders which blocks → CSC VOICE, LLC 612K VANCEBORO NC
2014-01-14 253-259 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-01-14 254-676 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 IRENE TX
2014-01-14 314-224 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C ST LOUIS MO
2014-01-14 605-309 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - SD 106F NOVALENTIN SD
2014-01-14 615-805 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PORTLAND TN
2014-01-14 717-753 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 CHAMBERSBG PA
2014-01-14 757-230 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NRFOLKZON1 VA
2014-01-13 202-753 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN1 DC
2014-01-13 631-652 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SMITHTOWN NY
2014-01-13 843-804 0–9 XXXall 10 · 4 holders which blocks → WOW! INTERNET, CABLE AND PHONE 961J CHARLESTON SC
2014-01-13 864-707 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SPARTANBG SC
2014-01-13 929-265 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN03 NY
2014-01-10 226-617 not yet reported which blocks → Comwave Networks 160G Comber —
2014-01-10 226-618 not yet reported which blocks → Comwave Networks 160G Stoney Point —
2014-01-10 226-619 not yet reported which blocks → Comwave Networks 160G Wheatley —
2014-01-10 226-620 not yet reported which blocks → Comwave Networks 160G Windsor —
2014-01-10 587-763 not yet reported which blocks → Distributel 081E Spruce Grove —
2014-01-10 587-764 not yet reported which blocks → Distributel 081E St. Albert —
2014-01-10 587-765 not yet reported which blocks → Distributel 081E Hinton —
2014-01-10 587-766 not yet reported which blocks → Distributel 081E Jasper —
2014-01-10 615-393 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2014-01-10 646-930 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2014-01-10 705-608 not yet reported which blocks → Comwave Networks 160G Bethany —
2014-01-10 705-609 not yet reported which blocks → Comwave Networks 160G Hastings —
2014-01-10 705-612 not yet reported which blocks → Comwave Networks 160G Omemee —
2014-01-10 705-616 not yet reported which blocks → Comwave Networks 160G Peterborough —
2014-01-10 720-467 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2014-01-10 865-337 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KNOXVILLE TN
2014-01-10 971-407 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2014-01-09 226-298 not yet reported which blocks → Comwave Networks 160G Acton —
2014-01-09 226-299 not yet reported which blocks → Comwave Networks 160G Guelph —
2014-01-09 253-391 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AUBURN WA
2014-01-09 289-728 not yet reported which blocks → Comwave Networks 160G Milton —
2014-01-09 289-767 not yet reported which blocks → Comwave Networks 160G Waterdown —
2014-01-09 289-787 not yet reported which blocks → Comwave Networks 160G Burlington —
2014-01-09 289-790 not yet reported which blocks → Comwave Networks 160G Georgetown —
2014-01-09 289-910 not yet reported which blocks → Comwave Networks 160G Oakville —
2014-01-09 470-218 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2014-01-09 681-231 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F MOOREFIELD WV
2014-01-09 832-503 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2014-01-09 832-853 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.