NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

8 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
LEVEL 3 COMMUNICATIONS, LLC - 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
2023-08-11 509-798-2XXX 2000–2999Assigned NUSO, LLC 732J SPOKANE WA
2023-08-11 509-986-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2023-07-26 509-433-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WENATCHEE WA
2023-07-26 509-781-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROSSER WA
2023-07-25 509-298-9XXX 9000–9999Assigned METROPCS, INC. 5562 MOSES LAKE WA
2023-07-14 509-564-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DEER PARK WA
2023-07-14 509-703-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2023-07-14 509-743-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2023-07-14 509-798-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2023-07-13 509-450-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EPHRATA WA
2023-07-13 509-923-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J PATEROS WA
2023-07-12 509-791-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GRANDVIEW WA
2023-07-06 509-733-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BREWSTER WA
2023-07-06 509-861-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OMAK WA
2023-06-16 509-450-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EPHRATA WA
2023-06-16 509-450-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EPHRATA WA
2023-06-12 509-274-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUNNYSIDE WA
2023-06-12 509-450-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2023-06-06 509-825-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E MEDICAL LK WA
2023-06-06 509-825-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E MEDICAL LK WA
2023-06-02 509-510-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2023-06-02 509-975-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PASCO WA
2023-05-19 509-310-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WH SALMON WA
2023-05-12 509-610-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COLFAX WA
2023-05-11 509-564-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DEER PARK WA
2023-05-05 509-798-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2023-05-05 509-798-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2023-05-05 509-798-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2023-05-01 509-206-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CLARKSTON WA
2023-04-25 509-746-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J YAKIMA WA
2023-04-25 509-746-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J YAKIMA WA
2023-04-25 509-746-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J YAKIMA WA
2023-04-25 509-746-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J YAKIMA WA
2023-04-25 509-746-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J YAKIMA WA
2023-04-20 509-920-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 CHEWELAH WA
2023-04-06 509-231-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J KENNEWICK WA
2023-04-06 509-300-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WENATCHEE WA
2023-04-06 509-360-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WALLAWALLA WA
2023-04-06 509-746-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J YAKIMA WA
2023-04-04 509-589-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J NEWPORT WA
2023-04-03 509-794-4XXX 4000–4999Assigned COMMIO, LLC 939H QUINCY WA
2023-04-03 509-825-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MEDICAL LK WA
2023-03-31 509-208-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2023-03-31 509-208-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2023-03-31 509-268-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2023-03-31 509-268-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2023-03-31 509-360-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WALLAWALLA WA
2023-03-31 509-360-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WALLAWALLA WA
2023-03-31 509-360-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALLAWALLA WA
2023-03-31 509-394-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TOUCHET WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.