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 816
SOUTHWESTERN BELL 36
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-03-12 816-631-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2016-11-04 816-317-1XXX 1000–1999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2016-11-04 816-317-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2016-11-04 816-317-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2016-06-23 816-647-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2016-06-23 816-647-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2016-06-23 816-647-8XXX 8000–8999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2016-06-23 816-647-9XXX 9000–9999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2016-05-06 816-317-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2016-05-06 816-317-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2016-05-06 816-317-8XXX 8000–8999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2016-05-06 816-317-9XXX 9000–9999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2015-07-23 816-207-1XXX 1000–1999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2015-03-10 816-599-9XXX 9000–9999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2011-12-19 816-434-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2011-11-04 816-287-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2010-01-22 816-607-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2009-10-01 816-604-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2009-08-04 816-604-1XXX 1000–1999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2009-08-04 816-604-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2009-08-04 816-604-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2009-08-04 816-604-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2009-08-04 816-604-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2008-10-16 816-382-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2008-10-13 816-607-0XXX 0000–0999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2008-01-21 816-482-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2008-01-21 816-512-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2007-04-17 816-282-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2006-03-22 816-291-9XXX 9000–9999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2006-03-22 816-292-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2006-03-22 816-325-8XXX 8000–8999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2005-12-19 816-359-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2005-12-19 816-359-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2005-12-19 816-359-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO
2002-06-19 816-251-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 LEESSUMMIT MO
2002-06-04 816-382-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 KANSASCITY MO

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.