136.231.0.0
Rotterdam · The Netherlands · SURF B.V.
- Autonomous system
- AS1103
- Country
- NL
- Risk score
- Not a probability
IP address summary
- IP address
- 136.231.0.0
- ASN
- AS1103
- Network operator
- SURF B.V.
- ISP
- SURF B.V.
- Containing network profile
- 136.0.0.0/8
- Operator category
- Academic
The containing profile is the nearest published aggregate. It is not a registry allocation or BGP ownership record.
Public ASN reference
- Reference ASN
- AS1103
- Source label
- SURFNET-NL SURF B.V.
- Reference interval
- 136.231.0.0 to 136.231.255.255
- Collected
IPtoASN maps this address interval to AS1103. An interval is not necessarily a BGP prefix or registered allocation. It does not establish geolocation or ownership.
IP geolocation
- Country
- The Netherlands
- City
- Rotterdam
- Region
- South Holland
- Postal code
- Not supplied
- Timezone
- Europe/
Amsterdam - Local time
- Approximate coordinates
- 52.021, 4.347
Network-level coordinates do not identify a precise user or device location. How geolocation works
VPN, proxy and network signals
0/ 100
- Threat evidence
- 0No threat-feed match
- Anonymity context
- 0Policy points
Score = max(threat, anonymity). Overlapping signals are not added.
Attribution and snapshot details
- DROP IPv4Current at lookup
- Checked:
Valid until: - ASN-DROPCurrent at lookup
- Checked:
Valid until:
© 2026 The Spamhaus Project SLU. DROP · Attribution and snapshot details
ipquery-risk-v2A low score is not proof that an address is safe. This assessment describes an address, not a person or a request.
View scoring methodASN and network operator
AS1103 profile- Organization
- SURF B.V.
- ASN domain
- surf.nl
- Operator type
- Academic
The ASN organization can differ from the organization using an individual address.
Network registration
- Matching record range
- 136.231.0.0/16
- Registered network name
- DELTARES-NET
- Registered network block
- 136.231.0.0/16
- Registration source
- RIPENCC WHOIS
- Company
- Stichting Deltares
- Usage type
- business
- Company website
- deltares.nl
Registration and company fields describe this source record. They can differ from the ASN operator and from live routing announcements.
Abuse contact
- Contact name
- SURF Network Maintainer
- Published contact network
- 136.231.0.0/16
- Abuse email
- cert@surfcert.nl
- Phone
- +31 88 7873000
- Postal address
- Kantoren Hoog Overborch (Hoog Catharijne), Moreelsepark 48, 3511 EP Utrecht, Postbus 19035, 3501 DA Utrecht
- Contact country
- The Netherlands
This contact is attached to the network record. Include the source IP, UTC timestamps and relevant logs when reporting abuse.
Actual API response
Open JSON{
"ip": "136.231.0.0",
"isp": {
"asn": "AS1103",
"org": "SURF B.V.",
"isp": "SURF B.V."
},
"location": {
"country": "The Netherlands",
"country_code": "NL",
"city": "Rotterdam",
"state": "South Holland",
"zipcode": "",
"latitude": 52.020921599813335,
"longitude": 4.346722009128139,
"timezone": "Europe/Amsterdam",
"localtime": "2026-11-05T23:29:53"
},
"risk": {
"is_mobile": false,
"is_vpn": false,
"is_tor": false,
"is_proxy": false,
"is_datacenter": false,
"risk_score": 0,
"assessment": {
"version": "ipquery-risk-v2",
"level": "none",
"threat_score": 0,
"anonymity_score": 0,
"coverage": "fresh",
"reasons": [],
"sources": [
{
"id": "spamhaus_drop_v4",
"status": "fresh",
"checked_at": "2026-11-05T04:15:06Z",
"expires_at": "2026-11-06T06:15:06Z",
"published_at": "2026-11-04T18:44:02Z"
},
{
"id": "spamhaus_asndrop",
"status": "fresh",
"checked_at": "2026-11-05T04:15:06Z",
"expires_at": "2026-11-06T06:15:06Z",
"published_at": "2026-11-05T03:44:02Z"
}
]
}
}
}