NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, all time — NPA 720
T-MOBILE USA, INC. 132
QWEST CORPORATION 103
NEW CINGULAR WIRELESS PCS, LLC 92
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 75
BANDWIDTH.COM CLEC, LLC - CO 55
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
2019-08-16 720-664 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D ALLNSPKLYN CO
2019-08-16 720-679 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D GEORGETOWN CO
2019-08-16 720-713 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CO 026D LONGMONT CO
2019-07-30 720-826 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J DENVER CO
2019-07-18 720-762 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2019-07-02 720-782 0–9 XXXall 10 · 2 holders which blocks → AT&T - LOCAL 7421 HUDSON CO
2019-06-25 720-691 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2019-06-20 720-677 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CO 026D DENVER CO
2019-06-20 720-712 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F FORTLUPTON CO
2019-06-12 720-779 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2019-06-03 720-653 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2019-05-22 720-797 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F KEENESBURG CO
2019-05-20 720-647 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CO 026D DENVER CO
2019-05-01 720-902 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2019-04-29 720-738 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D DENVER CO
2019-04-25 720-671 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2019-04-18 720-617 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J DENVER CO
2019-04-16 720-701 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 DENVER CO
2019-04-09 720-681 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2019-03-27 720-927 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F LONGMONT CO
2019-02-25 720-657 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2019-02-22 720-866 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J DENVER CO
2019-02-14 720-776 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F DECKERS CO
2019-02-08 720-715 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DECKERS CO
2019-01-28 720-640 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 HUDSON CO
2019-01-28 720-750 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2019-01-25 720-766 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H DENVER CO
2019-01-04 720-731 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 LONGMONT CO
2018-12-24 720-661 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2018-12-03 720-830 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J DENVER CO
2018-11-13 720-793 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2018-11-12 720-828 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2018-10-22 720-682 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2018-10-04 720-614 0–9 XXXall 10 · 3 holders which blocks → AIRESPRING, INC. 996H DENVER CO
2018-09-20 720-730 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CO 026D DENVER CO
2018-08-30 720-649 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F GEORGETOWN CO
2018-08-22 720-923 0–9 XXXall 10 · 5 holders which blocks → ADVANCED TELECOM SOLUTIONS, LLC 181J DENVER CO
2018-08-15 720-805 0–9 XXXall 10 · 2 holders which blocks → VOIP INNOVATIONS, LLC 597F DENVER CO
2018-07-30 720-610 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2018-06-29 720-574 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2018-06-14 720-926 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2018-06-12 720-727 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F LONGMONT CO
2018-05-15 720-928 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F FORTLUPTON CO
2018-03-30 720-547 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F KEENESBURG CO
2018-03-22 720-827 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2018-03-20 720-892 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2018-03-09 720-819 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2018-01-11 720-632 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 DENVER CO
2018-01-11 720-992 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 DENVER CO
2017-12-21 720-601 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.