NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-10-27 737-931 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2016-10-27 779-931 0XXX1XXX2XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - IL 1015 SANDWICH IL
2016-10-27 909-774 0–9 XXXall 10 · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K UPLAND CA
2016-10-26 561-774 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DELRAY BCH FL
2016-10-26 561-931 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J BOCA RATON FL
2016-10-26 639-252 not yet reported which blocks → Bell Mobility 6574 Luseland —
2016-10-26 639-253 not yet reported which blocks → Bell Mobility 6574 Neilburg —
2016-10-26 639-254 not yet reported which blocks → Bell Mobility 6574 Pierceland —
2016-10-26 639-255 not yet reported which blocks → Bell Mobility 6574 St. Walburg —
2016-10-26 639-256 not yet reported which blocks → Bell Mobility 6574 Watson —
2016-10-26 639-257 not yet reported which blocks → Bell Mobility 6574 Yellow Creek —
2016-10-26 639-258 not yet reported which blocks → Bell Mobility 6574 Beauval —
2016-10-26 639-259 not yet reported which blocks → Bell Mobility 6574 Ile-A-La-Crosse —
2016-10-26 763-347 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MN 8405 TWINCITIES MN
2016-10-26 763-361 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MN 8405 TWINCITIES MN
2016-10-26 813-955 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPACEN FL
2016-10-25 248-940 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2016-10-25 270-455 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HEBBARDSVL KY
2016-10-25 314-462 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K KIRKWOOD MO
2016-10-25 539-206 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 LOCUST GRV OK
2016-10-25 539-219 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 STRANG OK
2016-10-25 717-251 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J CHAMBERSBG PA
2016-10-25 857-424 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROXBURY MA
2016-10-24 272-762 0–9 XXXwhole prefix which blocks → VERIZON PENNSYLVANIA, INC. 9208 STROUDSBG PA
2016-10-24 469-782 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PLANO TX
2016-10-24 480-490 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2016-10-24 480-793 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2016-10-24 579-200 not yet reported which blocks → TELUS Quebec 2243 Lachute —
2016-10-24 579-201 not yet reported which blocks → TELUS Quebec 2243 St-Sauveur —
2016-10-24 579-202 not yet reported which blocks → TELUS Quebec 2243 Ste-Adele —
2016-10-24 579-203 not yet reported which blocks → TELUS Quebec 2243 Brownsburg —
2016-10-24 601-967 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BROOKHAVEN MS
2016-10-24 619-558 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL CAJON CA
2016-10-24 769-238 0XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EAGLE LAKE MS
2016-10-24 775-571 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEVADA, LLC - NV 408F PAHRUMP NV
2016-10-24 850-901 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TALLAHASSE FL
2016-10-24 859-216 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NOMIDDLETN KY
2016-10-24 916-713 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-10-21 438-504 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2016-10-21 480-869 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2016-10-21 510-822 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 OKLD TRNID CA
2016-10-21 623-233 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2016-10-20 240-918 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2016-10-20 312-764 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN01 IL
2016-10-20 337-518 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → DETEL WIRELESS, LLC - LA 650C VL PLATTE LA
2016-10-20 469-868 0–9 XXXall 10 · 5 holders which blocks → AIRUS, INC. - TX 951F DALLAS TX
2016-10-20 603-803 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J KEENE NH
2016-10-20 813-557 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPACEN FL
2016-10-19 225-998 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E DENHAM SPG LA
2016-10-19 234-423 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WILMOT OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.