NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-09-08 838-218 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J ALBANY NY
2020-09-08 845-804 1XXX which blocks → IP HORIZON LLC 515J POUGHKEPSI NY
2020-09-08 858-238 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-09-08 873-437 not yet reported which blocks → Iristel Inc. 154E Magog —
2020-09-08 909-847 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2020-09-08 909-849 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 S BERNDINO CA
2020-09-08 929-998 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NWYRCYZN06 NY
2020-09-08 949-749 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C IRVINE CA
2020-09-08 951-554 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 213-527 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 10 CA
2020-09-04 216-343 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F MONTRSE OH
2020-09-04 224-350 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → STRATUS NETWORKS 495J EVANSTON IL
2020-09-04 239-355 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J FORT MYERS FL
2020-09-04 254-408 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 COPPERASCV TX
2020-09-04 256-819 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J HUNTSVILLE AL
2020-09-04 360-583 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J VANCOUVER WA
2020-09-04 385-365 0–9 XXXwhole prefix which blocks → ONVOY, LLC - UT 871E AMERCNFORK UT
2020-09-04 385-853 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - UT 871E PLEASATGRV UT
2020-09-04 434-355 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H EPPES FORK VA
2020-09-04 434-356 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BROOKNEAL VA
2020-09-04 469-947 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K IRVING TX
2020-09-04 571-473 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J WSNGTNZN08 VA
2020-09-04 618-636 0–9 XXXall 10 · 7 holders which blocks → NUSO, LLC 478J ALTON IL
2020-09-04 639-469 not yet reported which blocks → Iristel Inc. 154E Langham —
2020-09-04 639-809 not yet reported which blocks → Iristel Inc. 154E Davidson —
2020-09-04 672-514 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2020-09-04 708-726 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → STRATUS NETWORKS 495J PEOTONE IL
2020-09-04 708-729 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → STRATUS NETWORKS 495J PALOS PARK IL
2020-09-04 708-734 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J SUMMIT IL
2020-09-04 769-245 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 478J JACKSON MS
2020-09-04 779-291 0XXX1XXX3XXX4XXX5XXX · 4 holders which blocks → STRATUS NETWORKS 495J WONDERLAKE IL
2020-09-04 779-292 0XXX1XXX3XXX4XXX5XXX · 3 holders which blocks → STRATUS NETWORKS 495J ONARGA IL
2020-09-04 779-293 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J NEW LENOX IL
2020-09-04 779-294 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → STRATUS NETWORKS 495J HARDING IL
2020-09-04 779-295 0XXX1XXX2XXX3XXX · 3 holders which blocks → STRATUS NETWORKS 495J MAZON IL
2020-09-04 782-492 not yet reported which blocks → Iristel Inc. 154E Middleton —
2020-09-04 813-698 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J TAMPACEN FL
2020-09-04 825-437 not yet reported which blocks → Videotron Ltd. 787G Calgary —
2020-09-04 873-363 not yet reported which blocks → Iristel Inc. 154E Deauville —
2020-09-04 907-931 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AK 9413 ANCHORAGE AK
2020-09-04 956-591 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MISSION TX
2020-09-04 956-656 0–9 XXXwhole prefix which blocks → STPCS JOINT VENTURE, LLC 4290 ZAPATA TX
2020-09-03 213-526 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MONTEBELLO CA
2020-09-03 240-738 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 HANCOCK MD
2020-09-03 252-324 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 SWNSBRWCAR NC
2020-09-03 267-921 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN38 PA
2020-09-03 302-844 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H SMYRNA DE
2020-09-03 346-435 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2020-09-03 412-947 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PTTSBGZON6 PA
2020-09-03 417-822 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H AURORA MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.