NumberResearchThousands-blocks in 620-563
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 620-563 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 620 blocks
Most active assignees, all time — NPA 620
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-01-25 | 620-563-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF KANSAS, LLC - KS | 018H | PLAINS | KS |
| — | 620-563-1XXX | 1000–1999 | Reserved | SOUTHWESTERN BELL | 9533 | PLAINS | KS |
| 2018-07-10 | 620-563-2XXX | 2000–2999 | Assigned | ONVOY, LLC - KS | 205F | PLAINS | KS |
| 2014-05-09 | 620-563-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - KS | 2240 | PLAINS | KS |
| 2017-05-09 | 620-563-4XXX | 4000–4999 | Assigned | UNITED COMMUNICATIONS ASSOCIATION, INC. - KS | 925G | PLAINS | KS |
| 2005-08-29 | 620-563-5XXX | 5000–5999 | Assigned | UNITED WIRELESS COMMUNICATIONS, INC. | 401D | PLAINS | KS |
| 2017-05-31 | 620-563-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - KS | 8995 | PLAINS | KS |
| — | 620-563-7XXX | 7000–7999 | Reserved | SOUTHWESTERN BELL | 9533 | PLAINS | KS |
| 2014-02-13 | 620-563-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PLAINS | KS |
| 2021-09-28 | 620-563-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PLAINS | KS |
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.