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
2015-09-17 509-740-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E OMAK WA
2015-09-16 509-295-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E CLARKSTON WA
2015-09-16 509-316-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2015-09-16 509-598-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-09-16 509-598-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-09-16 509-600-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E BRIDGEPORT WA
2015-09-16 509-655-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-09-16 509-761-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E MOSES LAKE WA
2015-09-16 509-771-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2015-09-15 509-260-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 CLE ELUM WA
2015-09-15 509-745-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E DOUGLASCO WA
2015-09-14 509-381-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2015-09-14 509-381-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2015-09-10 509-359-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E CHENEY WA
2015-09-10 509-359-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E CHENEY WA
2015-09-10 509-686-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BRIDGEPORT WA
2015-09-10 509-913-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E OTHELLO WA
2015-09-10 509-913-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E OTHELLO WA
2015-09-03 509-317-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2015-09-03 509-913-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2015-09-02 509-381-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPOKANE WA
2015-09-02 509-445-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CUSICK WA
2015-08-24 509-717-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2015-08-19 509-685-4XXX 4000–4999Assigned QWEST CORPORATION 9638 COLVILLE WA
2015-08-17 509-381-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2015-08-12 509-423-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2015-08-12 509-818-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-08-12 509-818-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-08-12 509-818-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-08-12 509-899-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ELLENSBURG WA
2015-08-11 509-560-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OROVILLE WA
2015-08-11 509-565-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MEDICAL LK WA
2015-08-11 509-733-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BREWSTER WA
2015-08-06 509-553-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COLFAX WA
2015-08-05 509-579-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KENNEWICK WA
2015-08-03 509-818-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2015-07-29 509-794-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 QUINCY WA
2015-07-15 509-843-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 POMEROY WA
2015-07-14 509-645-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 BREWSTER WA
2015-07-13 509-913-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2015-07-08 509-423-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2015-07-01 509-212-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2015-07-01 509-598-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2015-07-01 509-598-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2015-06-16 509-785-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GEORGE WA
2015-06-12 509-316-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F PASCO WA
2015-06-11 509-820-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2015-06-11 509-820-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2015-06-10 509-578-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RICHLAND WA
2015-06-09 509-288-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 COLFAX 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.