NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 463
LEVEL 3 COMMUNICATIONS, LLC - IN 55
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
2026-05-22 463-358-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2026-05-22 463-358-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2026-05-22 463-358-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2026-05-22 463-358-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2026-05-22 463-358-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2026-05-22 463-358-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2026-05-22 463-358-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2024-08-09 463-622-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 WESTFIELD IN
2024-08-09 463-622-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 WESTFIELD IN
2024-08-09 463-622-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 WESTFIELD IN
2024-02-27 463-298-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2024-02-13 463-293-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CARMEL IN
2024-01-03 463-403-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2023-12-15 463-291-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2023-12-15 463-291-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2023-12-15 463-291-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2023-12-15 463-291-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2023-10-24 463-261-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2023-05-24 463-388-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CARMEL IN
2023-04-27 463-261-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2022-10-25 463-687-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ACTON IN
2022-03-14 463-273-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CARMEL IN
2022-03-09 463-271-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2022-02-24 463-271-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2021-07-21 463-426-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2021-06-04 463-895-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2021-03-24 463-251-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2021-02-02 463-249-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2020-11-24 463-300-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 GREENWOOD IN
2020-11-13 463-223-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CARMEL IN
2020-10-08 463-237-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2020-08-27 463-241-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 GREENFIELD IN
2020-08-13 463-238-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 NOBLESVL IN
2020-08-12 463-237-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2020-07-02 463-234-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2020-05-26 463-231-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2020-04-28 463-228-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2020-04-21 463-231-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2020-04-02 463-232-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FORTVILLE IN
2020-01-25 463-228-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2020-01-25 463-228-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2020-01-25 463-228-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2020-01-25 463-228-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2020-01-25 463-228-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2019-11-27 463-800-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2019-02-07 463-212-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2019-01-09 463-213-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2018-12-06 463-212-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2018-12-06 463-213-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2018-12-06 463-213-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN

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.