NumberResearchThousands-blocks in 484-623
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 484-623 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 484 blocks
Most active assignees, all time — NPA 484
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-04-10 | 484-623-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA | 967E | SLATINGTON | PA |
| 2013-04-10 | 484-623-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA | 967E | SLATINGTON | PA |
| 2009-04-22 | 484-623-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | SLATINGTON | PA |
| 2019-03-13 | 484-623-3XXX | 3000–3999 | Assigned | CORE COMMUNICATIONS, INC. - PA | 3806 | SLATINGTON | PA |
| 2005-06-15 | 484-623-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | SLATINGTON | PA |
| 2020-07-22 | 484-623-5XXX | 5000–5999 | Assigned | ONVOY, LLC - PA | 547E | SLATINGTON | PA |
| 2020-07-22 | 484-623-6XXX | 6000–6999 | Assigned | ONVOY, LLC - PA | 547E | SLATINGTON | PA |
| 2019-03-13 | 484-623-7XXX | 7000–7999 | Assigned | CORE COMMUNICATIONS, INC. - PA | 3806 | SLATINGTON | PA |
| 2017-11-27 | 484-623-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | SLATINGTON | PA |
| 2016-03-02 | 484-623-9XXX | 9000–9999 | Assigned | ONVOY, LLC - PA | 547E | SLATINGTON | PA |
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.