NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 303
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 223
ONVOY, LLC - CO 208
NEW CINGULAR WIRELESS PCS, LLC 147
T-MOBILE USA, INC. 69
LEVEL 3 COMMUNICATIONS, LLC - CO 68
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2007-03-28 303-214-3XXX 3000–3999Assigned PEERLESS NETWORK OF COLORADO, LLC - CO 278F DENVER CO
2007-03-28 303-993-0XXX 0000–0999Assigned ONVOY, LLC - CO 026D DENVER CO
2007-03-13 303-243-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 DENVER CO
2007-03-12 303-500-7XXX 7000–7999Assigned ONVOY, LLC - CO 026D HUDSON CO
2007-03-12 303-578-7XXX 7000–7999Assigned ONVOY, LLC - CO 026D KEENESBURG CO
2007-02-28 303-578-5XXX 5000–5999Assigned ONVOY, LLC - CO 026D KEENESBURG CO
2007-02-27 303-243-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J DENVER CO
2007-02-15 303-635-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-02-15 303-997-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-02-15 303-997-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-02-15 303-997-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-02-15 303-997-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-02-15 303-997-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-02-15 303-997-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-02-08 303-353-1XXX 1000–1999Assigned ONVOY, LLC - CO 026D DENVER CO
2007-02-08 303-856-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-02-08 303-856-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-02-01 303-900-1XXX 1000–1999Assigned ONVOY, LLC - CO 026D GEORGETOWN CO
2007-01-18 303-495-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-495-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-495-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-495-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-681-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-681-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-681-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-681-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-681-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-727-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-728-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-889-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-945-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-945-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-945-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-945-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2007-01-18 303-997-2XXX 2000–2999Assigned ONVOY, LLC - CO 026D DENVER CO
2007-01-18 303-997-3XXX 3000–3999Assigned ONVOY, LLC - CO 026D DENVER CO
2007-01-17 303-835-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-01-11 303-353-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-01-11 303-481-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-01-11 303-834-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J LONGMONT CO
2007-01-11 303-872-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2007-01-11 303-900-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 GEORGETOWN CO
2007-01-11 303-923-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2006-12-29 303-501-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2006-12-14 303-243-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2006-12-14 303-501-8XXX 8000–8999Assigned ONVOY, LLC - CO 026D DENVER CO
2006-11-30 303-955-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2006-11-30 303-963-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2006-11-30 303-975-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DENVER CO
2006-11-16 303-974-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 DENVER CO

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.