NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, all time — NPA 240
ONVOY, LLC - MD 56
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
2023-02-22 240-977 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN6 MD
2023-01-13 240-982 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D GAITHERSBG MD
2021-09-01 240-798 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D GAITHERSBG MD
2021-09-01 240-809 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D SMITHSBURG MD
2021-09-01 240-819 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MD 876D WILLIAMSPT MD
2021-09-01 240-827 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - MD 876D LONACONING MD
2021-09-01 240-836 2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - MD 876D MT SAVAGE MD
2021-03-25 240-759 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D WSNG238Z15 MD
2021-03-25 240-820 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - MD 876D ASHTON238 MD
2021-03-15 240-822 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D NEW MARKET MD
2021-03-15 240-824 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D FROSTBURG MD
2021-03-15 240-834 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D KITZMILLER MD
2021-03-15 240-942 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - MD 876D BITTINGER MD
2021-03-15 240-944 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - MD 876D WESTERNPT MD
2021-03-03 240-910 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D FREDERICK MD
2021-01-21 240-885 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D WSNGTNZN10 MD
2020-11-06 240-443 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN6 MD
2020-11-06 240-945 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN3 MD
2020-11-06 240-956 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2020-07-16 240-226 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D OAKLAND MD
2020-07-16 240-851 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → ONVOY, LLC - MD 876D MCCOOLE MD
2020-06-09 240-301 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - MD 876D CLEAR SPG MD
2020-05-28 240-202 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MD 876D HIGHFIELD MD
2020-05-08 240-995 1XXX2XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - MD 876D FLINTSTONE MD
2019-10-10 240-873 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D BUCKEYSTN MD
2019-10-10 240-874 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D THURMONT MD
2019-10-10 240-875 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D MOUNT AIRY MD
2017-12-18 240-655 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D KITZMILLER MD
2017-07-05 240-563 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN5 MD
2016-09-02 240-451 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D THURMONT MD
2016-09-02 240-862 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MD 876D MT SAVAGE MD
2016-09-02 240-870 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - MD 876D MIDDLETOWN MD
2016-09-02 240-908 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D WALKERSVL MD
2016-09-02 240-913 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MD 876D DAMASCS240 MD
2016-08-25 240-877 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D FREDERICK MD
2016-07-11 240-859 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MD 876D ASHTON238 MD
2016-04-26 240-831 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D FREDERICK MD
2016-02-24 240-570 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MD 876D ASHTON238 MD
2016-02-18 240-771 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D POOLESVL MD
2015-12-23 240-261 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D GAITHERSBG MD
2015-12-09 240-847 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN3 MD
2015-06-02 240-970 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D WSNGTNZN12 MD
2015-02-18 240-900 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MD 876D WSHNGTNZN4 MD
2011-11-17 240-650 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN3 MD
— 240-337 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN5 MD
— 240-349 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - MD 876D LA PLATA MD
— 240-363 not yet reported which blocks → ONVOY, LLC - MD 876D WSNGTNZN11 MD
— 240-391 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D WSNG236Z13 MD
— 240-445 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN2 MD
— 240-448 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D WALDORF MD

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.