NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

6 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 901
ONVOY, LLC - TN 4
NEW CINGULAR WIRELESS PCS, LLC - GA 1
E. RITTER COMMUNICATIONS, LLC 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
2011-06-09 901-220-3XXX 3000–3999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-06-09 901-220-4XXX 4000–4999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-06-09 901-220-5XXX 5000–5999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-06-09 901-220-6XXX 6000–6999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-06-09 901-220-7XXX 7000–7999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-06-09 901-220-8XXX 8000–8999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-06-09 901-220-9XXX 9000–9999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-06-06 901-308-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MEMPHIS TN
2011-06-06 901-308-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MEMPHIS TN
2011-05-31 901-800-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MEMPHIS TN
2011-05-31 901-800-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MEMPHIS TN
2011-05-31 901-800-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MEMPHIS TN
2011-05-13 901-800-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2011-05-13 901-800-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2011-05-09 901-600-1XXX 1000–1999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-05-09 901-600-2XXX 2000–2999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-05-09 901-600-3XXX 3000–3999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-05-09 901-600-4XXX 4000–4999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-05-09 901-600-5XXX 5000–5999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-05-09 901-600-6XXX 6000–6999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-05-09 901-600-7XXX 7000–7999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-05-09 901-600-8XXX 8000–8999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-04-29 901-231-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C WESTWHITEV TN
2011-04-29 901-877-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C MOSCOW TN
2011-04-29 901-878-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C LAGRANGE TN
2011-04-28 901-235-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SOMERVILLE TN
2011-04-28 901-286-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F COLLIERVL TN
2011-04-28 901-303-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F MEMPHIS TN
2011-04-28 901-310-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F MEMPHIS TN
2011-04-28 901-343-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F MEMPHIS TN
2011-04-28 901-451-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F ARLINGTON TN
2011-04-28 901-860-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COLLIERVL TN
2011-04-28 901-860-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COLLIERVL TN
2011-04-28 901-877-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F MOSCOW TN
2011-04-14 901-900-0XXX 0000–0999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-04-14 901-900-1XXX 1000–1999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-04-14 901-900-2XXX 2000–2999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-04-14 901-900-3XXX 3000–3999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-04-14 901-900-4XXX 4000–4999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-04-14 901-900-5XXX 5000–5999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-04-14 901-900-6XXX 6000–6999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-04-14 901-900-7XXX 7000–7999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-04-14 901-900-8XXX 8000–8999Assigned METROPCS, INC. 5562 MEMPHIS TN
2011-04-14 901-900-9XXX 9000–9999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2011-03-28 901-800-3XXX 3000–3999Assigned BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MEMPHIS TN
2011-03-22 901-310-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C MEMPHIS TN
2011-03-10 901-878-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F LAGRANGE TN
2011-03-08 901-417-6XXX 6000–6999Assigned ONVOY, LLC - TN 525E MEMPHIS TN
2011-03-04 901-231-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F WESTWHITEV TN
2011-03-04 901-600-0XXX 0000–0999Assigned POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN

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.