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
2012-11-27 484-403 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 BETHLEHEM PA
2012-11-27 512-993 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2012-11-27 513-667 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 551G CINCINNATI OH
2012-11-27 567-315 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G TOLEDO OH
2012-11-27 604-428 not yet reported which blocks → Shaw Telecom Inc. 497E Vancouver —
2012-11-27 614-914 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G COLUMBUS OH
2012-11-27 937-802 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G DAYTON OH
2012-11-27 940-205 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DENTON TX
2012-11-26 469-336 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MIDLOTHIAN TX
2012-11-26 469-407 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 FORNEY TX
2012-11-26 832-805 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2012-11-26 832-808 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2012-11-26 954-702 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 FTLAUDERDL FL
2012-11-26 956-360 0–9 XXXwhole prefix which blocks → STPCS JOINT VENTURE, LLC 4290 MISSION TX
2012-11-23 415-481 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SNFC JUNPR CA
2012-11-23 415-589 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2012-11-23 480-271 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2012-11-23 480-340 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2012-11-23 581-813 not yet reported which blocks → TELUS Quebec 2243 Beauceville —
2012-11-23 613-437 not yet reported which blocks → TELUS Integrated Communications 2782 Ottawa-Hull —
2012-11-23 873-408 not yet reported which blocks → TELUS Quebec 2243 Ottawa-Hull —
2012-11-23 970-340 0–9 XXXall 10 · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 CARBONDALE CO
2012-11-21 202-818 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN1 DC
2012-11-21 305-504 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 KEYS FL
2012-11-21 323-437 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2012-11-21 407-609 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERPARK FL
2012-11-21 469-347 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2012-11-21 512-998 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AUSTIN TX
2012-11-21 561-406 0–9 XXXall 10 · 6 holders which blocks → ITS FIBER, LLC 572G JUPITER FL
2012-11-21 618-601 0–9 XXXall 10 · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K DUPO IL
2012-11-21 714-215 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2012-11-21 832-774 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HSTNSUBURB TX
2012-11-21 916-389 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SCRM MAIN CA
2012-11-21 954-470 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 FTLAUDERDL FL
2012-11-20 239-219 0–9 XXXall 10 · 4 holders which blocks → ORLANDO TELEPHONE COMPANY DBA SUMMIT BROADBAND 7857 FORT MYERS FL
2012-11-20 252-739 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HENDERSON NC
2012-11-20 312-800 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN01 IL
2012-11-20 385-222 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2012-11-20 385-333 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - UT 871E OGDEN UT
2012-11-20 385-777 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E BOUNTIFUL UT
2012-11-20 385-800 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E MURRAY UT
2012-11-20 385-888 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E KAYSVILLE UT
2012-11-20 402-999 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NE 549E OMAHA NE
2012-11-20 469-412 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C FORNEY TX
2012-11-20 469-414 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C COMBINE TX
2012-11-20 469-415 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C MAYPEARL TX
2012-11-20 469-423 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C BLUE RIDGE TX
2012-11-20 475-222 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2012-11-20 520-433 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 TUCSON AZ
2012-11-20 571-386 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN19 VA

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.