NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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 509
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 3
NEW CINGULAR WIRELESS PCS, LLC 2
EXIANT COMMUNICATIONS LLC 2
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
2009-10-13 509-713-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RICHLAND WA
2009-10-02 509-780-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLARKSTON WA
2009-09-23 509-340-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SPOKANE WA
2009-09-14 509-380-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2009-09-14 509-385-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2009-09-14 509-385-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2009-09-14 509-406-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2009-09-14 509-899-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELLENSBURG WA
2009-09-09 509-318-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CONNELL WA
2009-09-09 509-449-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BRIDGEPORT WA
2009-09-09 509-853-0XXX 0000–0999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 YAKIMA WA
2009-08-26 509-330-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PULLMAN WA
2009-08-26 509-346-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2009-08-25 509-318-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONNELL WA
2009-08-17 509-321-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SPOKANE WA
2009-08-14 509-847-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2009-08-14 509-847-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2009-08-13 509-406-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2009-08-13 509-439-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SUNNYSIDE WA
2009-08-13 509-470-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2009-08-13 509-470-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2009-08-13 509-557-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OMAK WA
2009-08-13 509-572-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2009-07-29 509-314-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TOPPENISH WA
2009-07-21 509-778-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PROSSER WA
2009-07-17 509-368-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2009-07-15 509-713-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHLAND WA
2009-07-10 509-406-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2009-07-10 509-406-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2009-07-10 509-720-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2009-07-10 509-723-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2009-07-10 509-723-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2009-07-06 509-440-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2009-07-06 509-440-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2009-06-30 509-557-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OMAK WA
2009-06-29 509-416-7XXX 7000–7999Assigned QWEST CORPORATION 9638 PASCO WA
2009-06-29 509-416-8XXX 8000–8999Assigned QWEST CORPORATION 9638 PASCO WA
2009-06-08 509-426-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 YAKIMA WA
2009-06-05 509-449-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BRIDGEPORT WA
2009-06-05 509-690-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 COLVILLE WA
2009-06-05 509-770-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2009-05-27 509-440-6XXX 6000–6999Assigned METROPCS, INC. 5562 KENNEWICK WA
2009-05-22 509-237-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EPHRATA WA
2009-05-22 509-415-0XXX 0000–0999Assigned METROPCS, INC. 5562 WENATCHEE WA
2009-05-21 509-671-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 NEWPORT WA
2009-05-13 509-987-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2009-04-21 509-737-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2009-04-09 509-222-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2009-03-16 509-406-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2009-03-16 509-727-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KENNEWICK 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.