NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

8 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
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
2019-11-06 509-409-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-06 509-409-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-06 509-409-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-06 509-409-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-05 509-407-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-05 509-407-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-05 509-407-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-05 509-407-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-05 509-407-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-05 509-565-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 MEDICAL LK WA
2019-11-04 509-503-0XXX 0000–0999Assigned INTRADO COMMUNICATIONS, LLC 841C SPOKANE WA
2019-11-04 509-503-2XXX 2000–2999Assigned INTRADO COMMUNICATIONS, LLC 841C SPOKANE WA
2019-11-04 509-503-3XXX 3000–3999Assigned INTRADO COMMUNICATIONS, LLC 841C SPOKANE WA
2019-11-04 509-503-4XXX 4000–4999Assigned INTRADO COMMUNICATIONS, LLC 841C SPOKANE WA
2019-11-04 509-503-5XXX 5000–5999Assigned INTRADO COMMUNICATIONS, LLC 841C SPOKANE WA
2019-10-28 509-503-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPOKANE WA
2019-10-16 509-219-5XXX 5000–5999Assigned ASTOUND BROADBAND, LLC - WA 937F STEVENSON WA
2019-10-08 509-730-2XXX 2000–2999Assigned TELNYX LLC 073H WALLAWALLA WA
2019-10-02 509-800-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F CLARKSTON WA
2019-09-26 509-503-7XXX 7000–7999Assigned INTRADO COMMUNICATIONS, LLC 841C SPOKANE WA
2019-09-24 509-408-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F LIBERTY LK WA
2019-09-18 509-418-1XXX 1000–1999Assigned EXIANT COMMUNICATIONS LLC 114J SPOKANE WA
2019-09-13 509-502-1XXX 1000–1999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2019-09-10 509-862-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2019-09-05 509-771-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MOSES LAKE WA
2019-08-30 509-595-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PULLMAN WA
2019-08-29 509-640-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLVILLE WA
2019-08-13 509-873-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2019-08-09 509-400-1XXX 1000–1999Assigned UNITED STATES CELLULAR - WA 6270 MATTAWA WA
2019-08-06 509-956-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WALLAWALLA WA
2019-07-30 509-503-1XXX 1000–1999Assigned VOIP INNOVATIONS, LLC 597F SPOKANE WA
2019-07-25 509-432-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 PULLMAN WA
2019-07-25 509-490-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2019-07-25 509-490-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2019-07-25 509-559-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 CHENEY WA
2019-07-09 509-637-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WH SALMON WA
2019-07-09 509-732-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E NORTHPORT WA
2019-07-08 509-666-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2019-07-05 509-900-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2019-07-05 509-900-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2019-07-05 509-907-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2019-07-03 509-890-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DEER PARK WA
2019-07-01 509-303-2XXX 2000–2999Assigned METROPCS, INC. 5562 PROSSER WA
2019-06-28 509-715-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E PULLMAN WA
2019-06-21 509-282-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CONNELL WA
2019-06-20 509-739-2XXX 2000–2999Assigned CORETEL WASHINGTON, INC. - WA 453J ALMIRA WA
2019-06-20 509-905-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PASCO WA
2019-06-19 509-975-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2019-06-11 509-676-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E WALLAWALLA WA
2019-06-11 509-676-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E WALLAWALLA 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.