NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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

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, last 30 days
8X8, INC. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2012-01-10 513-512 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CINCINNATI OH
2012-01-10 901-206 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MEMPHIS TN
2012-01-10 909-346 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D FONTANA CA
2012-01-09 253-442 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2012-01-09 317-540 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2012-01-09 317-551 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2012-01-09 443-202 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2012-01-09 502-909 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LOUISVILLE KY
2012-01-09 505-434 not yet reported which blocks → PLATEAU TELECOMMUNICATIONS, INC. - NM 777B LAS VEGAS NM
2012-01-09 939-322 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2012-01-06 249-301 not yet reported which blocks → TELUS Integrated Communications 2782 Midland —
2012-01-06 331-201 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DOWNERSGRV IL
2012-01-06 587-732 not yet reported which blocks → Fido Solutions Inc. 5643 Athabasca —
2012-01-06 587-733 not yet reported which blocks → Fido Solutions Inc. 5643 Rocky Mountain House —
2012-01-06 587-736 not yet reported which blocks → Fido Solutions Inc. 5643 Stettler —
2012-01-06 587-737 not yet reported which blocks → Fido Solutions Inc. 5643 High River —
2012-01-06 587-738 not yet reported which blocks → Fido Solutions Inc. 5643 Ponoka —
2012-01-06 587-739 not yet reported which blocks → Fido Solutions Inc. 5643 Cardston —
2012-01-05 334-336 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SLOCOMB AL
2012-01-05 587-272 not yet reported which blocks → Shaw Telecom Inc. 497E Red Deer —
2012-01-05 705-450 not yet reported which blocks → Shaw Telecom Inc. 497E Sault Ste. Marie —
2012-01-05 807-286 not yet reported which blocks → Shaw Telecom Inc. 497E Thunder Bay —
2012-01-04 276-312 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 GRUNDY VA
2012-01-04 385-275 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
2012-01-04 434-421 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 DANVILLE VA
2012-01-04 561-240 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 JUPITER FL
2012-01-04 775-386 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RENO NV
2012-01-04 848-208 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 EATONTOWN NJ
2012-01-03 720-465 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2012-01-03 813-337 0–9 XXXall 10 · 7 holders which blocks → NUSO, LLC 551G TAMPACEN FL
2011-12-30 385-203 0–9 XXXall 10 · 3 holders which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 PROVO UT
2011-12-30 442-281 0–9 XXXall 10 · 4 holders which blocks → PACIFIC BELL 9740 ESCONDIDO CA
2011-12-30 801-396 0–9 XXXall 10 · 4 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D SPRINGVL UT
2011-12-29 386-410 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NWSMYRNBCH FL
2011-12-29 407-307 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2011-12-29 786-424 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2011-12-29 863-213 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LAKELAND FL
2011-12-29 954-203 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 FTLAUDERDL FL
2011-12-28 231-299 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 MANISTEE MI
2011-12-28 405-698 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2011-12-28 469-302 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J MCKINNEY TX
2011-12-28 567-307 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MANSFIELD OH
2011-12-28 609-541 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ATLNTIC CY NJ
2011-12-28 760-998 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E VTVL HSPR CA
2011-12-28 813-320 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E TAMPASTH FL
2011-12-28 856-333 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J MERCHANTVL NJ
2011-12-27 360-729 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9638 VANCOUVER WA
2011-12-27 405-565 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2011-12-27 502-795 0–9 XXXall 10 · 4 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C LOUISVILLE KY
2011-12-27 606-535 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K EUBANK KY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.