Data as of Nov 7, 2026
162.57.128.0/17
No anonymizer space · no proxy exits in 30 daysMDU Resources Group, Inc.
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 162.57.0.0/16 since Oct 2018 | AS64226 | Business | MDU Resources Group, Inc. |
Nesting
More-specifics by size
Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 162.57.128.0/18 since Feb 2020 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.146.0/23 since Dec 2023 | AS15305 | Business | MDU Resources Group, Inc. | |
| 162.57.192.0/18 since Feb 2020 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.232.0/24 since Feb 2023 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.235.0/24 since Feb 2023 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.236.0/24 since Feb 2023 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.239.0/24 since Feb 2023 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.241.0/24 since Feb 2023 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.242.0/24 since Feb 2023 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.243.0/24 since Feb 2023 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.244.0/24 since Feb 2023 | AS64226 | Business | MDU Resources Group, Inc. | |
| 162.57.245.0/24 since Mar 2026 | AS64226 | Business | MDU Resources Group, Inc. |
Network & registry
Origin network
AS64226
US
- Name
- MDU Resources Group, Inc.
- Type
- Business
- Registered
- Oct 6, 2015
- Domain
- mdu.com
- Industry
- Natural Gas Distribution
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Dec 2015
- Current origin since
- Aug 2016 · 10 yr
- Origin networks
- 2
- Last change of origin
- Feb 2018
Recorded history
History
- Handoffs
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS26794 not the origin | RADB | MDU | MAINT-AS26794 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 162.
57. 0. 0/ 16 - Netname
- MDURES
- Registrant
- MDU Resources Group, Inc.
- Organization
- MDU Resources Group, Inc. (MONTAN-2)
- Org address
- 400 N. 4th Street, Bismarck, ND, 58501
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-162-57-0-0-1
- Parent
- NET-162-0-0-0-0
- Created
- Aug 4, 1992
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 4, 1992
- Status
- assigned
Report abuse
Abuse contact
- paul.
martin@ mdu. com - Name
- Martin, Paul
- Phone
- +1-701-530-1720
- Handle
- MARTI1030-ARIN