NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
Most active assignees, all time — NPA 787
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 787-863 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | FAJARDO | PR |
| — | 787-864 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | GUAYAMA | PR |
| — | 787-865 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ROOSEVLTRD | PR |
| — | 787-866 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | GUAYAMA | PR |
| — | 787-867 | 8XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | OROCOVIS | PR |
| — | 787-868 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | AGUADA | PR |
| — | 787-869 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | NARANJITO | PR |
| — | 787-870 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | TOA ALTA | PR |
| — | 787-871 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CIALES | PR |
| — | 787-872 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ISABELA | PR |
| — | 787-873 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SABANAGRND | PR |
| — | 787-874 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | NAGUABO | PR |
| — | 787-875 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | COMERIO | PR |
| — | 787-876 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CANOVANAS | PR |
| — | 787-877 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | MOCA | PR |
| — | 787-878 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ARECIBO | PR |
| — | 787-879 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ARECIBO | PR |
| — | 787-880 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ARECIBO | PR |
| — | 787-881 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTANA | PR |
| — | 787-882 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | AGUADILLA | PR |
| — | 787-883 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | VEGA ALTA | PR |
| — | 787-884 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | MANATI | PR |
| — | 787-885 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ROOSEVLTRD | PR |
| — | 787-886 | 8XXX9XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | CANOVANAS | PR |
| — | 787-887 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIO GRANDE | PR |
| — | 787-888 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIO GRANDE | PR |
| — | 787-889 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | LUQUILLO | PR |
| — | 787-890 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RAMEY | PR |
| — | 787-891 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | AGUADILLA | PR |
| — | 787-892 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SAN GERMAN | PR |
| — | 787-893 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | YABUCOA | PR |
| — | 787-894 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | UTUADO | PR |
| — | 787-895 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | QUEBRADLLS | PR |
| — | 787-896 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANSBSTIAN | PR |
| — | 787-897 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | LARES | PR |
| — | 787-898 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAMUY | PR |
| — | 787-899 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | LAJAS | PR |
| — | 787-903 | 0–9 XXXall 10 · 2 holders which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 639J | TRUJILLOAL | PR |
| — | 787-906 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | BAYAMONNOR | PR |
| — | 787-908 | 0–9 XXXwhole prefix which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 639J | BAYAMONSUR | PR |
| — | 787-910 | not yet reported which blocks → | PUERTO RICO TELCO DBA CLARO PUERTO RICO | 4823 | TRUJILLOAL | PR |
| — | 787-911 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PR |
| — | 787-912 | 8XXX which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 8305 | LASPIEDRAS | PR |
| — | 787-915 | 3XXX8XXX · 2 holders which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 8305 | VEGA ALTA | PR |
| — | 787-917 | not yet reported which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 8305 | CIALES | PR |
| — | 787-918 | 8XXX9XXX · 2 holders which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 639J | RIOPIEDRAS | PR |
| — | 787-922 | not yet reported which blocks → | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| — | 787-924 | 4XXX8XXX · 2 holders which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 8305 | AGUASBUNAS | PR |
| — | 787-925 | 1XXX which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 639J | RIOPIEDRAS | PR |
| — | 787-926 | not yet reported which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 8305 | SANSBSTIAN | PR |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.