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
2006-08-16 509-431-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2006-08-16 509-492-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2006-08-10 509-396-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENNEWICK WA
2006-08-10 509-396-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENNEWICK WA
2006-08-10 509-439-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SUNNYSIDE WA
2006-08-10 509-699-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2006-08-10 509-699-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2006-08-04 509-901-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2006-08-04 509-901-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2006-08-04 509-901-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2006-08-04 509-901-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2006-08-04 509-901-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2006-07-17 509-481-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-07-17 509-481-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-07-17 509-481-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-07-17 509-481-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-07-17 509-481-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-07-17 509-481-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-07-13 509-387-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2006-06-28 509-443-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2006-06-28 509-443-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2006-06-28 509-443-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2006-06-16 509-860-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2006-06-14 509-846-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OMAK WA
2006-06-13 509-378-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2006-06-12 509-416-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E PASCO WA
2006-06-12 509-481-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SPOKANE WA
2006-06-12 509-481-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SPOKANE WA
2006-06-12 509-481-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SPOKANE WA
2006-05-25 509-628-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2006-05-25 509-628-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2006-05-24 509-331-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OTHELLO WA
2006-05-18 509-842-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2006-05-18 509-842-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2006-05-18 509-842-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2006-05-18 509-842-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2006-05-16 509-368-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2006-05-08 509-205-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2006-05-05 509-240-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WALLAWALLA WA
2006-05-05 509-331-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2006-05-03 509-936-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CHEWELAH WA
2006-04-28 509-494-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2006-04-21 509-654-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2006-04-21 509-654-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2006-04-10 509-254-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CLARKSTON WA
2006-03-31 509-290-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2006-03-31 509-290-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2006-03-28 509-660-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E RITZVILLE WA
2006-03-27 509-396-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENNEWICK WA
2006-03-22 509-398-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA 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.