NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 815
VERSATEL LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 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
2015-05-26 815-457-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CISSNAPARK IL
2015-05-26 815-473-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WOODLAND IL
2015-05-26 815-486-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DONOVAN IL
2015-05-26 815-495-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LELAND IL
2015-05-26 815-627-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PAW PAW IL
2015-05-26 815-648-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HEBRON IL
2015-05-26 815-682-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STOCKLAND IL
2015-05-26 815-694-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLIFTON IL
2015-05-26 815-697-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHEBANSE IL
2015-05-26 815-698-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ASHKUM IL
2015-05-26 815-862-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RICHMOND IL
2015-05-26 815-889-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILFORD IL
2015-05-19 815-329-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2015-05-19 815-329-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2015-05-19 815-329-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2015-05-19 815-329-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2015-05-19 815-329-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2015-05-13 815-940-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E GARDNER IL
2015-05-12 815-201-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E SHERIDAN IL
2015-05-12 815-310-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E UTICA IL
2015-05-12 815-324-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E OTTAWA IL
2015-05-12 815-408-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E UTICA IL
2015-05-12 815-491-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ROCKFORD IL
2015-05-12 815-862-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E RICHMOND IL
2015-05-11 815-269-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E DANFORTH IL
2015-05-11 815-339-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E GRANVILLE IL
2015-05-11 815-374-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E DWIGHT IL
2015-05-11 815-486-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E DONOVAN IL
2015-05-11 815-648-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E HEBRON IL
2015-05-06 815-329-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ROCKFORD IL
2015-04-27 815-314-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MANHATTAN IL
2015-04-21 815-242-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MINOOKA IL
2015-04-21 815-242-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MINOOKA IL
2015-04-21 815-661-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MORRIS IL
2015-04-21 815-661-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MORRIS IL
2015-04-21 815-884-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E EARLVILLE IL
2015-04-21 815-884-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E EARLVILLE IL
2015-04-16 815-240-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ROCK CUT IL
2015-04-07 815-581-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 SPRING GRV IL
2015-03-10 815-596-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MARENGO IL
2015-03-06 815-691-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C UTICA IL
2015-03-05 815-907-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 MANTENO IL
2015-02-19 815-854-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 LONG POINT IL
2015-02-04 815-860-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ELWOOD IL
2015-02-04 815-888-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ROCHELLE IL
2015-02-04 815-888-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ROCHELLE IL
2015-01-27 815-386-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E KANKAKEE IL
2015-01-23 815-491-6XXX 6000–6999Assigned ONVOY, LLC 224C ROCKFORD IL
2015-01-16 815-491-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKFORD IL
2015-01-14 815-714-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JOLIET IL

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.