NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

10 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 217
ONVOY, LLC 3
NEW CINGULAR WIRELESS PCS, LLC - IL 3
EXIANT COMMUNICATIONS LLC 3
OPENTACT INC. 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
2017-08-21 217-573-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 RAYMOND IL
2017-08-21 217-608-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HILLSBORO IL
2017-08-21 217-630-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NOKOMIS IL
2017-08-21 217-716-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARLINVL IL
2017-08-21 217-729-7XXX 7000–7999Assigned ONVOY, LLC 224C CHAMPAURBN IL
2017-08-21 217-839-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GILLESPIE IL
2017-08-21 217-913-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 STONINGTON IL
2017-08-18 217-910-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ASSUMPTION IL
2017-08-10 217-438-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 AUBURN IL
2017-08-10 217-468-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OREANA IL
2017-08-10 217-665-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BETHANY IL
2017-08-10 217-874-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DALTONCITY IL
2017-08-10 217-901-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BLUE MOUND IL
2017-08-10 217-965-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 VIRDEN IL
2017-08-09 217-495-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSSVILLE IL
2017-08-09 217-587-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MANCHESTER IL
2017-08-09 217-795-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ARGENTA IL
2017-08-07 217-291-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSONVL IL
2017-07-26 217-208-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHARLESTON IL
2017-07-26 217-719-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JACKSONVL IL
2017-07-24 217-203-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E BUFFALO IL
2017-07-24 217-282-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 RANTOUL IL
2017-07-24 217-923-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 GREENUP IL
2017-07-20 217-655-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DANVILLE IL
2017-07-20 217-806-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DANVILLE IL
2017-07-06 217-496-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 SHERMAN IL
2017-07-05 217-742-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINCHESTER IL
2017-06-30 217-279-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WEST UNION IL
2017-06-30 217-619-8XXX 8000–8999Assigned ONVOY, LLC 224C DECATUR IL
2017-06-20 217-895-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 NEOGA IL
2017-06-14 217-850-1XXX 1000–1999Assigned ONVOY, LLC 224C CHAMPAURBN IL
2017-05-31 217-303-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2017-05-31 217-381-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2017-05-12 217-806-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DANVILLE IL
2017-05-12 217-806-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DANVILLE IL
2017-05-12 217-806-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DANVILLE IL
2017-05-05 217-970-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SPRINGFLD IL
2017-05-02 217-800-0XXX 0000–0999Assigned COMMIO, LLC 939H CHAMPAURBN IL
2017-04-26 217-884-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J REDMON IL
2017-04-25 217-269-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHRISMAN IL
2017-04-25 217-275-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VERMILION IL
2017-04-25 217-279-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WEST UNION IL
2017-04-25 217-340-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MARSHALL IL
2017-04-25 217-385-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BROCTON IL
2017-04-25 217-712-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PARIS IL
2017-04-25 217-887-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J METCALF IL
2017-04-14 217-695-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 QUINCY IL
2017-04-14 217-695-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 QUINCY IL
2017-04-14 217-695-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 QUINCY IL
2017-04-14 217-695-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 QUINCY 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.