NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
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
2012-12-19 305-440 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J KEYS FL
2012-12-19 320-317 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 OGILVIE MN
2012-12-19 732-243 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 METUCHEN NJ
2012-12-19 928-278 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 BULLHEADCY AZ
2012-12-19 954-248 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HOLLYWOOD FL
2012-12-18 210-712 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 551G SANANTONIO TX
2012-12-18 469-352 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCKINNEY TX
2012-12-18 469-425 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ANNA TX
2012-12-18 619-382 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2012-12-18 702-829 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NV 029F LAUGHLIN NV
2012-12-18 754-206 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J FTLAUDERDL FL
2012-12-18 754-610 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HOLLYWOOD FL
2012-12-18 832-850 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2012-12-18 972-597 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ITALY TX
2012-12-17 352-708 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D CLERMONT FL
2012-12-17 424-289 0–9 XXXall 10 · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNMN MRVS CA
2012-12-17 509-379 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2012-12-17 518-556 0–9 XXXall 10 · 9 holders which blocks → WIDE VOICE, LLC - NY 705G COLONIE NY
2012-12-17 518-558 0–9 XXXall 10 · 3 holders which blocks → CROWN POINT NTWK TECH INC DBA BRIDGE POINT COMM-NY 716G TICONDROGA NY
2012-12-17 774-357 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J FALL RIVER MA
2012-12-14 229-463 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C SYLVESTER GA
2012-12-14 424-287 0–9 XXXall 10 · 9 holders which blocks → T-MOBILE USA, INC. 6529 SAN PEDRO CA
2012-12-14 509-740 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 OMAK WA
2012-12-14 581-271 not yet reported which blocks → Telecommunications Xittel Inc 247F Leeds —
2012-12-14 581-272 not yet reported which blocks → Telecommunications Xittel Inc 247F Inverness —
2012-12-14 581-330 not yet reported which blocks → Telecommunications Xittel Inc 247F Garthby —
2012-12-14 581-331 not yet reported which blocks → Telecommunications Xittel Inc 247F East Broughton —
2012-12-14 819-654 not yet reported which blocks → TELUS Quebec 2243 Ottawa-Hull —
2012-12-13 210-708 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2012-12-13 440-432 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BEREA OH
2012-12-13 440-438 0–9 XXXall 10 · 2 holders which blocks → SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE 735E TRINITY OH
2012-12-13 440-509 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BEREA OH
2012-12-13 440-515 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HILLCREST OH
2012-12-13 440-631 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 VICTORY OH
2012-12-13 440-702 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HILLCREST OH
2012-12-13 469-410 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 TERRELL TX
2012-12-13 581-266 not yet reported which blocks → Telecommunications Xittel Inc 247F Black Lake —
2012-12-13 581-267 not yet reported which blocks → Telecommunications Xittel Inc 247F Tring Jonction —
2012-12-13 581-268 not yet reported which blocks → Telecommunications Xittel Inc 247F Thetford Mines —
2012-12-13 581-269 not yet reported which blocks → Telecommunications Xittel Inc 247F Stratford —
2012-12-13 581-270 not yet reported which blocks → Telecommunications Xittel Inc 247F St-Ferdinand-D'Halifax —
2012-12-13 614-928 0–9 XXXall 10 · 3 holders which blocks → SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE 735E COLUMBUS OH
2012-12-13 720-737 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2012-12-13 727-350 0–9 XXXall 10 · 5 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L STPETERSBG FL
2012-12-13 832-831 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J HOUSTON TX
2012-12-13 832-845 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HOUSTON TX
2012-12-13 832-901 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HOUSTON TX
2012-12-13 867-373 not yet reported which blocks → Bell Mobility 6574 Fort Providence —
2012-12-13 867-374 not yet reported which blocks → Bell Mobility 6574 Tulita —
2012-12-13 915-519 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K EL PASO TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.