NumberResearchThousands-blocks in 620-921
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 620-921 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 |
|---|---|---|---|---|---|---|---|
| — | 620-921-0XXX | 0000–0999 | Reserved | UNITED STATES CELLULAR - KS | 6267 | HUTCHINSON | KS |
| — | 620-921-1XXX | 1000–1999 | Reserved | UNITED STATES CELLULAR - KS | 6267 | HUTCHINSON | KS |
| 2022-08-26 | 620-921-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS | 6532 | HUTCHINSON | KS |
| 2007-04-10 | 620-921-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS | 7593 | HUTCHINSON | KS |
| 2020-01-15 | 620-921-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - KS | 8995 | HUTCHINSON | KS |
| — | 620-921-5XXX | 5000–5999 | Reserved | SOUTHWESTERN BELL | 9533 | HUTCHINSON | KS |
| — | 620-921-6XXX | 6000–6999 | Reserved | SOUTHWESTERN BELL | 9533 | HUTCHINSON | KS |
| — | 620-921-7XXX | 7000–7999 | Reserved | SOUTHWESTERN BELL | 9533 | HUTCHINSON | KS |
| — | 620-921-8XXX | 8000–8999 | Reserved | SOUTHWESTERN BELL | 9533 | HUTCHINSON | KS |
| — | 620-921-9XXX | 9000–9999 | Reserved | SOUTHWESTERN BELL | 9533 | HUTCHINSON | 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.