NumberResearch Membership · Data 2026-04

Recent prefix assignments

352 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
8X8, INC. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 31
NEW CINGULAR WIRELESS PCS, LLC - DC 30
ONVOY, LLC - CA 28
ONVOY, LLC - NJ 18
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
787-281 PUERTO RICO TEL. CO. 3201 RIOPIEDRAS PR
787-282 PUERTO RICO TEL. CO. 3201 RIOPIEDRAS PR
787-283 PUERTO RICO TEL. CO. 3201 TRUJILLOAL PR
787-284 PUERTO RICO TEL. CO. 3201 PONCE PR
787-285 PUERTO RICO TEL. CO. 3201 HUMACAO PR
787-286 PUERTO RICO TEL. CO. 3201 CAGUAS PR
787-287 PUERTO RICO TEL. CO. 3201 GUAYNABO PR
787-288 PUERTO RICO TEL. CO. 3201 BAYAMONNOR PR
787-289 PUERTO RICO TEL. CO. 3201 SANTURCE PR
787-290 PUERTO RICO TEL. CO. 3201 PONCE PR
787-291 LIBERTY MOBILE PUERTO RICO INC. 8305 QUEBRADLLS PR
787-292 PUERTO RICO TEL. CO. 3201 TRUJILLOAL PR
787-293 PUERTO RICO TEL. CO. 3201 TRUJILLOAL PR
787-294 PUERTO RICO TEL. CO. 3201 RIOPIEDRAS PR
787-295 METROPCS, INC. 5562 SANTURCE PR
787-296 PUERTO RICO TEL. CO. 3201 RIOPIEDRAS PR
787-300 LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
787-301 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D GUAYANILLA PR
787-302 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D RIOPIEDRAS PR
787-303 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D SANTURCE PR
787-304 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D PUEBLOVIEJ PR
787-305 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D TRUJILLOAL PR
787-306 LIBERTY MOBILE PUERTO RICO INC. 639J RIOPIEDRAS PR
787-307 LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
787-308 LIBERTY MOBILE PUERTO RICO INC. 639J RIOPIEDRAS PR
787-309 LIBERTY MOBILE PUERTO RICO INC. 639J RIOPIEDRAS PR
787-310 SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
787-311 MULTIPLE OCN LISTING MULT XXXXXXXXXX PR
787-312 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-313 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-314 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-315 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-316 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-317 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 SANTURCE PR
787-318 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 SANTURCE PR
787-319 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 SANTURCE PR
787-321 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-322 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-323 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-324 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-325 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-326 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 SANTURCE PR
787-327 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 SANTURCE PR
787-328 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-329 PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
787-330 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D LEVITTOWN PR
787-331 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D GUAYNABO PR
787-332 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D RIOPIEDRAS PR
787-333 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D ARECIBO PR
787-334 OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 087D RIO GRANDE 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.