NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2022-07-22 872-314 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN02 IL
2022-07-22 984-301 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E RALEIGH NC
2022-07-21 256-965 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F HARTSELLE AL
2022-07-21 334-852 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F PRATTVILLE AL
2022-07-21 334-854 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F SELMA AL
2022-07-21 343-597 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2022-07-21 385-469 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E OGDEN UT
2022-07-21 437-299 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2022-07-21 437-366 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2022-07-21 437-425 not yet reported which blocks → Bell Mobility 6574 Toronto —
2022-07-21 438-466 not yet reported which blocks → Bell Mobility 6574 Montreal —
2022-07-21 530-932 0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANDERSON CA
2022-07-21 551-353 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F JERSEYCITY NJ
2022-07-21 582-215 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REYNOLDSVL PA
2022-07-21 603-956 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D PORTSMOUTH NH
2022-07-21 605-902 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - SD 106F WATERTOWN SD
2022-07-21 615-723 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OAK GROVE TN
2022-07-21 657-609 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2022-07-21 659-258 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F WARRIOR AL
2022-07-21 659-259 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F LEEDS AL
2022-07-21 669-321 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2022-07-21 720-953 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2022-07-21 808-509 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2022-07-21 816-552 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MO 093F KANSASCITY MO
2022-07-21 858-379 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E EL CAJON CA
2022-07-21 878-553 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PTTSBGZON1 PA
2022-07-21 915-332 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL PASO TX
2022-07-21 925-502 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2022-07-21 937-345 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F DAYTON OH
2022-07-20 331-287 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E AURORA IL
2022-07-20 346-575 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HSTNSUBURB TX
2022-07-20 385-463 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2022-07-20 478-874 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MACON GA
2022-07-20 520-653 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-07-20 572-275 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H OKLA CITY OK
2022-07-20 661-610 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD MAIN CA
2022-07-20 689-281 0–9 XXXall 10 · 5 holders which blocks → WOW! INTERNET, CABLE AND PHONE 961J SANFORD FL
2022-07-20 943-208 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 BUFORD GA
2022-07-19 220-231 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 JOHNSTOWN OH
2022-07-19 307-230 0XXX which blocks → BANDWIDTH.COM CLEC, LLC - WY 081F BORDER WY
2022-07-19 332-267 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2022-07-19 343-992 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2022-07-19 343-993 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2022-07-19 404-282 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA GA
2022-07-19 404-533 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H ATLANTA GA
2022-07-19 412-239 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2022-07-19 474-895 not yet reported which blocks → TELUS Integrated Communications 2782 Assiniboia —
2022-07-19 474-896 not yet reported which blocks → TELUS Integrated Communications 2782 Tisdale —
2022-07-19 474-897 not yet reported which blocks → TELUS Integrated Communications 2782 Nipawin —
2022-07-19 474-898 not yet reported which blocks → TELUS Integrated Communications 2782 Melfort —

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.