NumberResearchRecent prefix assignments
380 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
Most active assignees, last 30 days
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 787-831 | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR | |
| 787-832 | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR | |
| 787-833 | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR | |
| 787-834 | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR | |
| 787-835 | PUERTO RICO TEL. CO. | 3201 | GUAYANILLA | PR | |
| 787-836 | PUERTO RICO TEL. CO. | 3201 | PENUELAS | PR | |
| 787-837 | PUERTO RICO TEL. CO. | 3201 | JUANA DIAZ | PR | |
| 787-838 | PUERTO RICO TEL. CO. | 3201 | MARICAO | PR | |
| 787-839 | PUERTO RICO TEL. CO. | 3201 | ARROYO | PR | |
| 787-840 | PUERTO RICO TEL. CO. | 3201 | PONCE | PR | |
| 787-841 | PUERTO RICO TEL. CO. | 3201 | PONCE | PR | |
| 787-842 | PUERTO RICO TEL. CO. | 3201 | PONCE | PR | |
| 787-843 | PUERTO RICO TEL. CO. | 3201 | PONCE | PR | |
| 787-844 | PUERTO RICO TEL. CO. | 3201 | PONCE | PR | |
| 787-845 | PUERTO RICO TEL. CO. | 3201 | SAN ISABEL | PR | |
| 787-846 | PUERTO RICO TEL. CO. | 3201 | BARCELONTA | PR | |
| 787-847 | PUERTO RICO TEL. CO. | 3201 | VILLALBA | PR | |
| 787-848 | PUERTO RICO TEL. CO. | 3201 | PONCE | PR | |
| 787-849 | PUERTO RICO TEL. CO. | 3201 | HORMIGUERO | PR | |
| 787-850 | PUERTO RICO TEL. CO. | 3201 | HUMACAO | PR | |
| 787-851 | PUERTO RICO TEL. CO. | 3201 | CABO ROJO | PR | |
| 787-852 | PUERTO RICO TEL. CO. | 3201 | HUMACAO | PR | |
| 787-853 | PUERTO RICO TEL. CO. | 3201 | AGUIRRE | PR | |
| 787-854 | PUERTO RICO TEL. CO. | 3201 | MANATI | PR | |
| 787-855 | PUERTO RICO TEL. CO. | 3201 | VEGA BAJA | PR | |
| 787-856 | PUERTO RICO TEL. CO. | 3201 | YAUCO | PR | |
| 787-857 | PUERTO RICO TEL. CO. | 3201 | BARRANQUTS | PR | |
| 787-858 | PUERTO RICO TEL. CO. | 3201 | VEGA BAJA | PR | |
| 787-859 | PUERTO RICO TEL. CO. | 3201 | COROZAL | PR | |
| 787-860 | PUERTO RICO TEL. CO. | 3201 | FAJARDO | PR | |
| 787-861 | PUERTO RICO TEL. CO. | 3201 | MAUNABO | PR | |
| 787-862 | PUERTO RICO TEL. CO. | 3201 | MOROVIS | PR | |
| 787-863 | PUERTO RICO TEL. CO. | 3201 | FAJARDO | PR | |
| 787-864 | PUERTO RICO TEL. CO. | 3201 | GUAYAMA | PR | |
| 787-865 | PUERTO RICO TEL. CO. | 3201 | ROOSEVLTRD | PR | |
| 787-866 | PUERTO RICO TEL. CO. | 3201 | GUAYAMA | PR | |
| 787-867 | PUERTO RICO TEL. CO. | 3201 | OROCOVIS | PR | |
| 787-868 | PUERTO RICO TEL. CO. | 3201 | AGUADA | PR | |
| 787-869 | PUERTO RICO TEL. CO. | 3201 | NARANJITO | PR | |
| 787-870 | PUERTO RICO TEL. CO. | 3201 | TOA ALTA | PR | |
| 787-871 | PUERTO RICO TEL. CO. | 3201 | CIALES | PR | |
| 787-872 | PUERTO RICO TEL. CO. | 3201 | ISABELA | PR | |
| 787-873 | PUERTO RICO TEL. CO. | 3201 | SABANAGRND | PR | |
| 787-874 | PUERTO RICO TEL. CO. | 3201 | NAGUABO | PR | |
| 787-875 | PUERTO RICO TEL. CO. | 3201 | COMERIO | PR | |
| 787-876 | PUERTO RICO TEL. CO. | 3201 | CANOVANAS | PR | |
| 787-877 | PUERTO RICO TEL. CO. | 3201 | MOCA | PR | |
| 787-878 | PUERTO RICO TEL. CO. | 3201 | ARECIBO | PR | |
| 787-879 | PUERTO RICO TEL. CO. | 3201 | ARECIBO | PR | |
| 787-880 | PUERTO RICO TEL. CO. | 3201 | ARECIBO | PR |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.