NumberResearchThousands-blocks in 505-487
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 505-487 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 505 blocks
Most active assignees, all time — NPA 505
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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-07-22 | 505-487-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM | 6573 | LOS ALAMOS | NM |
| 2022-10-24 | 505-487-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | LOS ALAMOS | NM |
| 2021-11-08 | 505-487-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - NM | 123F | LOS ALAMOS | NM |
| 2022-02-28 | 505-487-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM | 6573 | LOS ALAMOS | NM |
| 2023-07-25 | 505-487-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF NEW MEXICO, LLC - NM | 377H | LOS ALAMOS | NM |
| 2024-01-10 | 505-487-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LOS ALAMOS | NM |
| 2023-07-12 | 505-487-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM | 6573 | LOS ALAMOS | NM |
| 2021-08-03 | 505-487-7XXX | 7000–7999 | Assigned | ONVOY, LLC - NM | 206F | LOS ALAMOS | NM |
| 2021-08-03 | 505-487-8XXX | 8000–8999 | Assigned | ONVOY, LLC - NM | 206F | LOS ALAMOS | NM |
| 2022-05-02 | 505-487-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LOS ALAMOS | NM |
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.