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
2016-01-21 509-992-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2016-01-15 509-934-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2016-01-15 509-934-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2016-01-14 509-537-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F PASCO WA
2016-01-14 509-676-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F WALLAWALLA WA
2016-01-13 509-960-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-12-31 509-897-2XXX 2000–2999Assigned QWEST CORPORATION 9638 WALLAWALLA WA
2015-12-31 509-897-3XXX 3000–3999Assigned QWEST CORPORATION 9638 WALLAWALLA WA
2015-12-31 509-897-5XXX 5000–5999Assigned QWEST CORPORATION 9638 WALLAWALLA WA
2015-12-31 509-897-8XXX 8000–8999Assigned QWEST CORPORATION 9638 WALLAWALLA WA
2015-12-30 509-960-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2015-12-22 509-300-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E WENATCHEE WA
2015-12-22 509-317-5XXX 5000–5999Assigned NATIVE NETWORK, INC. 483H YAKIMA WA
2015-12-21 509-620-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E COULEE DAM WA
2015-12-14 509-212-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2015-12-10 509-391-1XXX 1000–1999Assigned METROPCS, INC. 5562 SUNNYSIDE WA
2015-12-09 509-316-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2015-12-09 509-579-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2015-11-11 509-317-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 YAKIMA WA
2015-11-11 509-960-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2015-10-30 509-620-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COULEE DAM WA
2015-10-30 509-960-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SPOKANE WA
2015-10-29 509-960-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2015-10-20 509-761-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
2015-10-20 509-913-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2015-10-15 509-876-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WALLAWALLA WA
2015-10-12 509-433-3XXX 3000–3999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 WENATCHEE WA
2015-10-12 509-436-3XXX 3000–3999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 WENATCHEE WA
2015-10-12 509-436-4XXX 4000–4999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 WENATCHEE WA
2015-10-12 509-436-5XXX 5000–5999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 WENATCHEE WA
2015-10-12 509-436-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 WENATCHEE WA
2015-10-09 509-598-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-10-09 509-818-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-10-09 509-960-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2015-10-06 509-317-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2015-10-06 509-317-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K YAKIMA WA
2015-10-06 509-563-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLVILLE WA
2015-10-06 509-579-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2015-10-05 509-818-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2015-10-01 509-790-2XXX 2000–2999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2015-09-30 509-932-9XXX 9000–9999Assigned UNITED STATES CELLULAR - WA 6270 MATTAWA WA
2015-09-29 509-367-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2015-09-29 509-733-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BREWSTER WA
2015-09-29 509-740-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OMAK WA
2015-09-28 509-960-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2015-09-23 509-341-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TWISP WA
2015-09-21 509-578-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHLAND WA
2015-09-18 509-486-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E TONASKET WA
2015-09-17 509-381-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2015-09-17 509-579-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 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.