NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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, last 30 days — NPA 360
EXIANT COMMUNICATIONS LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 1
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
2017-03-22 360-324-3XXX 3000–3999Assigned METROPCS, INC. 5562 CHEHALIS WA
2017-03-22 360-429-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MT VERNON WA
2017-03-21 360-660-4XXX 4000–4999Assigned METROPCS, INC. 5562 ABERDEEN WA
2017-03-14 360-661-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MT VERNON WA
2017-03-09 360-728-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2017-03-07 360-660-3XXX 3000–3999Assigned RAINIER CONNECT, INC. - WA 7720 ABERDEEN WA
2017-03-03 360-644-8XXX 8000–8999Assigned METROPCS, INC. 5562 LONGVIEW WA
2017-03-02 360-522-1XXX 1000–1999Assigned METROPCS, INC. 5562 OLYMPIA WA
2017-02-27 360-686-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J YACOLT WA
2017-02-21 360-644-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LONGVIEW WA
2017-02-07 360-874-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORT ORCH WA
2017-02-07 360-960-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YELM WA
2017-02-03 360-309-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD WA
2017-02-03 360-309-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD WA
2017-02-03 360-309-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD WA
2017-02-03 360-309-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD WA
2017-02-03 360-309-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD WA
2017-02-03 360-605-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F VANCOUVER WA
2017-02-01 360-503-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MT VERNON WA
2017-01-31 360-474-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F MARYSVILLE WA
2017-01-17 360-503-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E MT VERNON WA
2017-01-17 360-784-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2017-01-11 360-410-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WHATCOMCTY WA
2017-01-11 360-784-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
2017-01-11 360-784-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
2017-01-11 360-968-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SHELTON WA
2016-12-16 360-727-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD WA
2016-12-15 360-399-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E MT VERNON WA
2016-12-13 360-988-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WHATCOMCTY WA
2016-12-12 360-522-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OLYMPIA WA
2016-12-12 360-522-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OLYMPIA WA
2016-12-06 360-994-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 POULSBO WA
2016-11-30 360-559-9XXX 9000–9999Assigned METROPCS, INC. 5562 CENTRALIA WA
2016-11-30 360-843-5XXX 5000–5999Assigned METROPCS, INC. 5562 BATTLEGRND WA
2016-11-28 360-503-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MT VERNON WA
2016-11-28 360-728-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2016-11-28 360-763-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OLYMPIA WA
2016-11-24 360-784-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2016-11-22 360-763-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E OLYMPIA WA
2016-11-03 360-660-0XXX 0000–0999Assigned METROPCS, INC. 5562 ABERDEEN WA
2016-11-02 360-279-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 OAK HARBOR WA
2016-10-27 360-548-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MARYSVILLE WA
2016-10-19 360-728-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BREMERTON WA
2016-10-14 360-728-0XXX 0000–0999Assigned METROPCS, INC. 5562 BREMERTON WA
2016-10-14 360-763-3XXX 3000–3999Assigned METROPCS, INC. 5562 OLYMPIA WA
2016-10-14 360-998-6XXX 6000–6999Assigned METROPCS, INC. 5562 LONGVIEW WA
2016-10-12 360-660-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ABERDEEN WA
2016-10-07 360-660-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ABERDEEN WA
2016-10-07 360-712-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ABERDEEN WA
2016-10-07 360-939-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MARYSVILLE WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.