NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 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 336
HD CARRIER LLC 3
ONVOY, LLC - NC 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
2018-03-08 336-559-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ELKIN NC
2018-03-08 336-628-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEBORO NC
2018-03-08 336-628-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEBORO NC
2018-03-08 336-860-1XXX 1000–1999Assigned ONVOY, LLC - NC 638E GREENSBORO NC
2018-03-08 336-860-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 GREENSBORO NC
2018-03-08 336-894-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2018-03-08 336-894-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2018-03-08 336-894-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2018-03-08 336-894-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2018-03-08 336-894-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2018-03-01 336-488-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BROOKS NC
2018-02-23 336-438-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K BURLINGTON NC
2018-02-23 336-864-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K EDEN NC
2018-02-19 336-864-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 EDEN NC
2018-02-06 336-990-8XXX 8000–8999Assigned UNITED STATES CELLULAR - NC 6282 NOWILKESBO NC
2018-02-01 336-304-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BOOMER NC
2018-02-01 336-400-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHAMPION NC
2018-02-01 336-563-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CLINGMAN NC
2018-01-29 336-452-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LOMAX NC
2018-01-16 336-585-5XXX 5000–5999Assigned METROPCS, INC. 5562 BURLINGTON NC
2018-01-16 336-942-3XXX 3000–3999Assigned METROPCS, INC. 5562 HIGH POINT NC
2018-01-10 336-860-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 GREENSBORO NC
2018-01-10 336-890-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREENSBORO NC
2018-01-10 336-890-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREENSBORO NC
2017-12-29 336-594-4XXX 4000–4999Assigned ONVOY, LLC - NC 638E STANLEYVL NC
2017-12-22 336-586-5XXX 5000–5999Assigned ONVOY, LLC - NC 638E BURLINGTON NC
2017-12-22 336-586-6XXX 6000–6999Assigned ONVOY, LLC - NC 638E BURLINGTON NC
2017-12-21 336-206-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BALDWIN NC
2017-12-18 336-390-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TIMBERLAKE NC
2017-12-18 336-646-6XXX 6000–6999Assigned ONVOY, LLC - NC 638E GREENSBORO NC
2017-12-18 336-646-7XXX 7000–7999Assigned ONVOY, LLC - NC 638E GREENSBORO NC
2017-12-13 336-567-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K BURLINGTON NC
2017-12-05 336-647-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ROXBORO NC
2017-11-30 336-628-8XXX 8000–8999Assigned ONVOY, LLC - NC 638E ASHEBORO NC
2017-11-20 336-604-3XXX 3000–3999Assigned METROPCS, INC. 5562 GREENSBORO NC
2017-11-17 336-551-1XXX 1000–1999Assigned ONVOY, LLC - NC 638E BOONVILLE NC
2017-11-16 336-489-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WJEFFERSON NC
2017-11-01 336-646-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2017-11-01 336-646-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2017-11-01 336-646-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2017-10-27 336-590-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2017-10-27 336-843-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2017-10-27 336-843-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2017-10-27 336-867-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2017-10-24 336-395-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K BURLINGTON NC
2017-10-10 336-654-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MILTON NC
2017-10-09 336-827-1XXX 1000–1999Assigned RIVERSTREET COMMUNICATIONS OF NO CAROLINA - NC 769H STATE ROAD NC
2017-09-26 336-200-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NC 998E ROARINGGAP NC
2017-09-25 336-296-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NC 998E KING NC
2017-09-25 336-530-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NC 998E ELKIN NC

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.