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 360
QWEST CORPORATION 170
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 82
ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 81
T-MOBILE USA, INC. 66
LEVEL 3 COMMUNICATIONS, LLC - WA 61
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
2025-09-19 360-781 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WHATCOMCTY WA
2021-10-22 360-803 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E RIDGEFIELD WA
2021-04-22 360-800 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H OLYMPIA WA
2020-09-04 360-583 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J VANCOUVER WA
2020-08-27 360-634 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2020-06-05 360-564 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E POULSBO WA
2020-05-26 360-541 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2020-05-21 360-360 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WA 483E VANCOUVER WA
2020-05-12 360-884 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OLYMPIA WA
2020-04-30 360-974 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F OLYMPIA WA
2020-03-26 360-206 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CENTRALIA WA
2020-01-09 360-919 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2019-11-26 360-946 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
2019-10-01 360-995 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2019-08-14 360-916 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 LONGVIEW WA
2019-04-15 360-845 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WA 483E PORT ORCH WA
2019-01-11 360-506 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E CENTRALIA WA
2019-01-11 360-641 0XXX1XXX2XXX4XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC - WA 483E ASHFORD WA
2019-01-11 360-997 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E BLACKDIMND WA
2018-10-05 360-228 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2018-04-24 360-585 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9638 CRYSTAL MT WA
2018-03-26 360-762 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 LONGVIEW WA
2018-03-23 360-517 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SILVERDALE WA
2018-03-06 360-743 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 ABERDEEN WA
2017-12-26 360-706 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J OLYMPIA WA
2017-10-13 360-764 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OLYMPIA WA
2017-02-21 360-644 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LONGVIEW WA
2017-02-03 360-309 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J RIDGEFIELD WA
2017-02-03 360-605 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F VANCOUVER WA
2016-09-21 360-660 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ABERDEEN WA
2016-09-21 360-728 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2016-07-20 360-559 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WA 483E CENTRALIA WA
2016-04-13 360-522 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OLYMPIA WA
2016-03-14 360-218 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WA 483E LONGVIEW WA
2016-01-22 360-763 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2016-01-06 360-745 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9638 PORTLUDLOW WA
2015-12-14 360-712 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ABERDEEN WA
2015-11-19 360-776 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BUCKLEY WA
2015-10-14 360-999 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OLYMPIA WA
2015-09-30 360-842 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2015-09-25 360-726 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
2015-09-22 360-768 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2015-09-22 360-998 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
2015-09-21 360-784 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 VANCOUVER WA
2015-09-16 360-900 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E SILVERDALE WA
2015-09-16 360-938 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - WA 483E WOODLAND WA
2015-07-23 360-505 0XXX2XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J GRAYHARBCO WA
2015-07-13 360-810 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OLYMPIA WA
2015-06-02 360-869 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J VANCOUVER WA
2014-11-06 360-787 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA

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.