Free network tools
AS WHOIS
Look up an Autonomous System — holder, registry, contacts, announced IPv4/IPv6 prefixes, upstreams and downstreams.
Network Report (All-in-one) BGP Looking Glass BGP Security Check RPKI Validator BGP Hijack & Leak Monitor ASN Intelligence Internet Outages & Anomalies Country Internet Report Domain Insights IP WHOIS AS WHOIS
AS9419
NTU-AS-AP - Nanyang Technological University Announcing routesAS nameNTU-AS-AP
OrganisationNanyang Technological University
CountrySG
Registry (RIR)APNIC
HandleAS9419
RangeAS9419
Registered04 Sep 2008
Last changed25 Nov 2020
Abuse contact[email protected]
4IPv4 prefixes
0IPv6 prefixes
5Upstreams
0Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS4657 | STARHUB-INTERNET - StarHub Ltd | 168 |
| AS23855 | SINGAREN-GIX-AS-AP - Singapore Advanced Research and Education Network | 126 |
| AS3758 | SINGNET - SingNet | 59 |
| AS6939 | HURRICANE - Hurricane Electric LLC | 16 |
| AS134148 | SINGAREN-GIX-AS-AP-2 - SingAREN | 11 |
Downstreams
None seen.
IPv4 prefixes (4)
RPKI-validate all prefixes of AS9419
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| abuse | IRT-NTU-NON-SG | IRT-NTU-NON-SG | [email protected], [email protected] | Nanyang Technological University, Centre for IT Services, 76 Nanyang Drive, N2.1-B1, Singapore 637331 |
| administrative, technical | Leonard Sim | LS253-AP | [email protected], +65 6790-5228, +65 6791-0688 | Nanyang Technological University, Centre for IT Services, Nanyang Ave, Singapore 639798 |
| registrant | Nanyang Technological University | ORG-NTU2-AP | [email protected], +65 6790 5231, +65 6791 0688 | Universitiy, C/- Centre for IT Services, 50 Nanyang Avenue |
Raw registry response
{
"rdapConformance": [
"history_version_0",
"nro_rdap_profile_0",
"nro_rdap_profile_asn_hierarchical_0",
"cidr0",
"rdap_level_0"
],
"notices": [
{
"title": "Source",
"description": [
"Objects returned came from source",
"APNIC"
]
},
{
"title": "Terms and Conditions",
"description": [
"This is the APNIC WHOIS Database query service. The objects are in RDAP format."
],
"links": [
{
"value": "https://rdap.apnic.net/autnum/9419",
"rel": "terms-of-service",
"href": "http://www.apnic.net/db/dbcopyright.html",
"type": "text/html"
}
]
},
{
"title": "Whois Inaccuracy Reporting",
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"value": "https://rdap.apnic.net/autnum/9419",
"rel": "inaccuracy-report",
"href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
"type": "text/html"
}
]
}
],
"country": "SG",
"name": "NTU-AS-AP",
"status": [
"active"
],
"events": [
{
"eventAction": "registration",
"eventDate": "2008-09-04T06:40:29Z"
},
{
"eventAction": "last changed",
"eventDate": "2020-11-25T06:42:43Z"
}
],
"links": [
{
"value": "https://rdap.apnic.net/autnum/9419",
"rel": "self",
"href": "https://rdap.apnic.net/autnum/9419",
"type": "application/rdap+json"
}
],
"remarks": [
{
"description": [
"Nanyang Technological University",
"Computer Centre, Nanyang Ave",
"Singapore 639798"
],
"title": "description"
},
{
"description": [
"for peering with SingaREN, and AI3/TP (transit via SingaREN)"
],
"title": "remarks"
}
],
"entities": [
{
"roles": [
"abuse"
],
"events": [
{
"eventAction": "registration",
"eventDate": "2014-05-12T02:33:32Z"
},
{
"eventAction": "last changed",
"eventDate": "2026-09-29T13:16:15Z"
}
],
"links": [
{
"value": "https://rdap.apnic.net/autnum/9419",
"rel": "self",
"href": "https://rdap.apnic.net/entity/IRT-NTU-NON-SG",
"type": "application/rdap+json"
}
],
"remarks": [
{
"description": [
"[email protected] was validated on 2026-09-29"
],
"title": "remarks"
}
],
"handle": "IRT-NTU-NON-SG",
"objectClassName": "entity",
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"IRT-NTU-NON-SG"
],
[
"kind",
[],
"text",
"group"
],
[
"adr",
{
"label": "Nanyang Technological University, Centre for IT Services\n76 Nanyang Drive\nN2.1-B1\nSingapore 637331"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"email",
[],
"text",
"[email protected]"
],
[
"email",
{
"pref": "1"
},
"text",
"[email protected]"
]
]
]
},
{
"roles": [
"administrative",
"technical"
],
"events": [
{
"eventAction": "registration",
"eventDate": "2008-09-04T07:29:15Z"
},
{
"eventAction": "last changed",
"eventDate": "2008-09-04T07:29:15Z"
}
],
"links": [
{
"value": "https://rdap.apnic.net/autnum/9419",
"rel": "self",
"href": "https://rdap.apnic.net/entity/LS253-AP",
"type": "application/rdap+json"
}
],
"handle": "LS253-AP",
"objectClassName": "entity",
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Leonard Sim"
],
[
"kind",
[],
"text",
"individual"
],
[
"adr",
{
"label": "Nanyang Technological University\nCentre for IT Services, Nanyang Ave\nSingapore 639798"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+65 6790-5228"
],
[
"tel",
{
"type": "fax"
},
"text",
"+65 6791-0688"
],
[
"email",
[],
"text",
"[email protected]"
]
]
]
},
{
"roles": [
"registrant"
],
"events": [
{
"eventAction": "registration",
"eventDate": "2020-11-25T05:40:14Z"
},
{
"eventAction": "last changed",
"eventDate": "2023-09-05T02:14:47Z"
}
],
"links": [
{
"value": "https://rdap.apnic.net/autnum/9419",
"rel": "self",
"href": "https://rdap.apnic.net/entity/ORG-NTU2-AP",
"type": "application/rdap+json"
}
],
"handle": "ORG-NTU2-AP",
"objectClassName": "entity",
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Nanyang Technological University"
],
[
"kind",
[],
"text",
"org"
],
[
"adr",
{
"label": "Universitiy\nC/- Centre for IT Services\n50 Nanyang Avenue"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+65 6790 5231"
],
[
"tel",
{
"type": "fax"
},
"text",
"+65 6791 0688"
],
[
"email",
[],
"text",
"[email protected]"
]
]
]
}
],
"handle": "AS9419",
"startAutnum": 9419,
"endAutnum": 9419,
"objectClassName": "autnum",
"port43": "whois.apnic.net"
}Results come from public internet registries and live global routing data. Results are cached for up to an hour. Lookups are logged with your IP address to prevent abuse — see our Privacy Policy.