Data as of Nov 3, 2026
170.10.142.0/24
No anonymizer space · no proxy exits in 30 daysMimecast North America Inc
Announcement
this exact prefix
RPKI valid
Announced by
Type
Business
Risk
30 / 100 · Medium
Recently moved
Recent change
New origin Sep 18, 2026
from AS136792 Mimecast Australia Pty Ltd, after 2.3 years unannounced
Network & registry
Origin network
AS30031
US
- Name
- Mimecast North America Inc
- Type
- Business
- Registered
- Jul 7, 2017
- Domain
- mimecast.com
- Industry
- Software Development
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Reactivated
- First seen
- Mar 2020
- Current origin since
- Sep 18, 2026 · 2 mo
- Origin networks
- 3
- Last change of origin
- Sep 18, 2026
Recorded history
History
- Handoffs
- 2
- Also announced by
- 37235;39588;42427
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 170.10.142.0/24 | AS30031 | /24 | ARIN | RPKI valid |
| 170.10.142.0/24 | AS33538 | /24 | ARIN | Another network |
| 170.10.142.0/24 | AS37235 | /24 | ARIN | Another network |
| 170.10.142.0/24 | AS39588 | /24 | ARIN | Another network |
| 170.10.142.0/24 | AS42427 | /24 | ARIN | Another network |
| 170.10.142.0/24 | AS60492 | /24 | ARIN | Another network |
| 170.10.142.0/24 | AS136792 | /24 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS30031 | RADB | Mimecast | MAINT-AS42427 | Nov 13, 2023 |
| AS33538 not the origin | RADB | Mimecast | MAINT-AS42427 | Nov 13, 2023 |
| AS37235 not the origin | RADB | Mimecast | MAINT-AS42427 | Nov 13, 2023 |
| AS39588 not the origin | RADB | Mimecast | MAINT-AS42427 | Nov 13, 2023 |
| AS42427 not the origin | RADB | Mimecast | MAINT-AS42427 | Nov 13, 2023 |
| AS136792 not the origin | RADB | Mimecast | MAINT-AS42427 | Nov 13, 2023 |
| AS136792 not the origin | NTTCOM | MIMECAST | MAINT-EQUINIXPAC | Mar 9, 2020 |
Whois
Registration for this announcement
- Range
- 170.10.128.0/19
- Netname
- MNA-95
- Registrant
- Mimecast North America Inc
- Organization
- Mimecast North America Inc (MNA-95)
- Org address
- 191 Spring St, Lexington, MA, 02421
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-170-10-128-0-1
- Parent
- NET-170-0-0-0-0
- Created
- Jan 10, 2020
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 10, 2020
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- MIMEC-ABUSE
- Phone
- +1-617-393-7050
- Handle
- MIMEC1-ARIN