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
2017-09-25 336-628-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K ASHEBORO NC
2017-09-20 336-901-5XXX 5000–5999Assigned METROPCS, INC. 5562 GIBSONVL NC
2017-09-05 336-666-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC
2017-09-05 336-666-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC
2017-09-05 336-955-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC
2017-09-05 336-955-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC
2017-08-31 336-567-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NC 998E BURLINGTON NC
2017-08-31 336-860-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D GREENSBORO NC
2017-08-30 336-270-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BURLINGTON NC
2017-08-30 336-278-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BURLINGTON NC
2017-08-30 336-521-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEBORO NC
2017-08-30 336-521-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEBORO NC
2017-08-30 336-523-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEBORO NC
2017-08-30 336-588-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEBORO NC
2017-08-30 336-942-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HIGH POINT NC
2017-08-30 336-942-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HIGH POINT NC
2017-08-30 336-942-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HIGH POINT NC
2017-08-30 336-942-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HIGH POINT NC
2017-08-16 336-942-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HIGH POINT NC
2017-08-14 336-488-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BROOKS NC
2017-08-09 336-866-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NC 998E LEWISVILLE NC
2017-08-03 336-590-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2017-08-03 336-590-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2017-08-03 336-590-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2017-08-01 336-836-1XXX 1000–1999Assigned UNITED STATES CELLULAR - NC 6282 RED BRUSH NC
2017-07-24 336-894-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2017-07-24 336-894-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2017-07-21 336-666-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 WINSTN SAL NC
2017-07-19 336-524-5XXX 5000–5999Assigned METROPCS, INC. 5562 BURLINGTON NC
2017-07-13 336-890-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NC 998E GREENSBORO NC
2017-07-13 336-890-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - NC 998E GREENSBORO NC
2017-06-30 336-223-7XXX 7000–7999Assigned ONVOY, LLC - NC 638E BURLINGTON NC
2017-06-28 336-901-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K GIBSONVL NC
2017-06-27 336-960-1XXX 1000–1999Assigned RIVERSTREET COMMUNICATIONS OF NO CAROLINA - NC 769H LEXINGTON NC
2017-06-22 336-604-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2017-06-22 336-604-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2017-06-13 336-666-5XXX 5000–5999Assigned ONVOY, LLC - NC 638E WINSTN SAL NC
2017-06-07 336-872-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 SEAGROVE NC
2017-06-06 336-762-2XXX 2000–2999Assigned METROPCS, INC. 5562 THOMASVL NC
2017-05-31 336-604-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2017-05-31 336-604-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREENSBORO NC
2017-05-24 336-646-1XXX 1000–1999Assigned SOUTH CAROLINA NET, INC. - NC 511C GREENSBORO NC
2017-05-23 336-628-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ASHEBORO NC
2017-05-16 336-914-2XXX 2000–2999Assigned ONVOY, LLC - NC 638E DANBURY NC
2017-05-12 336-967-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NC 998E KERNERSVL NC
2017-05-10 336-966-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL 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.