Whois & RDAP Lookup
V.PS Cloud KVM VPS for developers KVM VPS · 11 PoPs · 99.9% SLA Simple VPS, premium network · Pick a PoP, deploy in seconds 11 PoPs · APAC, Europe, North America Tier 1 upstreams Premium network · Low-latency routes Free 24×7 support €6.95/mo Deploy a serverDeploy153.121.0.0/18
RDAPIP Range153.0.0.0 - 153.255.255.255
Handle153.0.0.0 - 153.255.255.255
NameERX-NETBLOCK
TypeALLOCATED PORTABLE
CountryAU
Registered2008-09-04 06:51 UTC
Updated2026-09-23 22:33 UTC
Admin ContactAPNIC Hostmaster
Email[email protected]
Phone+61 7 3858 3100
AddressPO Box 3646, South Brisbane, QLD 4101
Tech ContactAPNIC Network Operations
Email[email protected]
Phone+61 7 3858 3100
AddressPO Box 3646, South Brisbane, QLD 4101
Abuse Contact[email protected]
Statusadministrative
Registry RDAPhttps://rdap.apnic.net
Raw WHOIS response
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to '153.121.0.0 - 153.121.31.255'
% Abuse contact for '153.121.0.0 - 153.121.31.255' is '[email protected]'
inetnum: 153.121.0.0 - 153.121.31.255
netname: SAKURA
descr: SAKURA Internet Inc.
descr: GRAND GREEN OSAKA North, JAM BASE 3F, 6-38 Ofukacho, Kita-ku, Osaka-shi, Osaka 530-0011, Japan
country: JP
admin-c: JNIC1-AP
tech-c: JNIC1-AP
status: ALLOCATED PORTABLE
remarks: Email address for spam or abuse complaints : [email protected]
mnt-irt: IRT-JPNIC-JP
mnt-by: MAINT-JPNIC
mnt-lower: MAINT-JPNIC
last-modified: 2024-09-29T23:29:56Z
source: APNIC
irt: IRT-JPNIC-JP
address: Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address: Chiyoda-ku, Tokyo 101-0047, japan
e-mail: [email protected]
abuse-mailbox: [email protected]
phone: +81-3-5297-2311
fax-no: +81-3-5297-2312
admin-c: JNIC1-AP
tech-c: JNIC1-AP
auth: # Filtered
remarks: [email protected] was validated on 2024-11-27
mnt-by: MAINT-JPNIC
last-modified: 2026-10-20T09:11:46Z
source: APNIC
role: Japan Network Information Center
address: Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address: Chiyoda-ku, Tokyo 101-0047, Japan
country: JP
phone: +81-3-5297-2311
fax-no: +81-3-5297-2312
e-mail: [email protected]
admin-c: JI13-AP
tech-c: JE53-AP
nic-hdl: JNIC1-AP
mnt-by: MAINT-JPNIC
last-modified: 2022-01-05T03:04:02Z
source: APNIC
% Information related to '153.121.0.0 - 153.121.0.255'
inetnum: 153.121.0.0 - 153.121.0.255
netname: SAKURA-NET
descr: SAKURA Internet Inc.
country: JP
admin-c: KT749JP
tech-c: JP00072233
last-modified: 2016-08-31T08:50:04Z
remarks: This information has been partially mirrored by APNIC from
remarks: JPNIC. To obtain more specific information, please use the
remarks: JPNIC WHOIS Gateway at
remarks: http://www.nic.ad.jp/en/db/whois/en-gateway.html or
remarks: whois.nic.ad.jp for WHOIS client. (The WHOIS client
remarks: defaults to Japanese output, use the /e switch for English
remarks: output)
source: JPNIC
% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-JP1)
% Query time: 388 msec
% WHEN: Wed Oct 21 03:10:24 UTC 2026
% Additional information from whois.nic.ad.jp
Network Information:
a. [Network Number] 153.121.0.0/24
b. [Network Name] SAKURA-NET
g. [Organization] SAKURA Internet Inc.
m. [Administrative Contact] KT749JP
n. [Technical Contact] JP00072233
o. [Abuse]
p. [Nameserver] ns1.dns.ne.jp
p. [Nameserver] ns2.dns.ne.jp
[Assigned Date] 2016/08/30
[Return Date]
[Last Update] 2016/08/30 23:50:04(JST)
Less Specific Info.
----------
SAKURA Internet Inc.
[Allocation] 153.121.0.0/19Raw RDAP JSON (registry) https://rdap.apnic.net
{
"cidr0_cidrs": [
{
"length": 8,
"v4prefix": "153.0.0.0"
}
],
"country": "AU",
"endAddress": "153.255.255.255",
"entities": [
{
"events": [
{
"eventAction": "registration",
"eventDate": "2008-09-04T07:29:15Z"
},
{
"eventAction": "last changed",
"eventDate": "2026-08-26T00:40:01Z"
}
],
"handle": "NO4-AP",
"links": [
{
"href": "https://rdap.apnic.net/entity/NO4-AP",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/153.121.0.0/18"
}
],
"objectClassName": "entity",
"remarks": [
{
"description": [
"Administrator for APNIC Network Operations"
],
"title": "remarks"
}
],
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"APNIC Network Operations"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "PO Box 3646\nSouth Brisbane\nQLD 4101"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+61 7 3858 3100"
],
[
"tel",
{
"type": "fax"
},
"text",
"+61 7 3858 3199"
],
[
"email",
{},
"text",
"[email protected]"
]
]
]
},
{
"events": [
{
"eventAction": "registration",
"eventDate": "2008-09-04T07:54:15Z"
},
{
"eventAction": "last changed",
"eventDate": "2026-08-26T00:40:00Z"
}
],
"handle": "HM20-AP",
"links": [
{
"href": "https://rdap.apnic.net/entity/HM20-AP",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/153.121.0.0/18"
}
],
"objectClassName": "entity",
"remarks": [
{
"description": [
"Administrator for APNIC"
],
"title": "remarks"
}
],
"roles": [
"administrative"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"APNIC Hostmaster"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "PO Box 3646\nSouth Brisbane\nQLD 4101"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+61 7 3858 3100"
],
[
"tel",
{
"type": "fax"
},
"text",
"+61 7 3858 3199"
],
[
"email",
{},
"text",
"[email protected]"
]
]
]
},
{
"events": [
{
"eventAction": "registration",
"eventDate": "2010-11-11T01:36:22Z"
},
{
"eventAction": "last changed",
"eventDate": "2025-11-18T00:26:21Z"
}
],
"handle": "IRT-APNIC-AP",
"links": [
{
"href": "https://rdap.apnic.net/entity/IRT-APNIC-AP",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/153.121.0.0/18"
}
],
"objectClassName": "entity",
"remarks": [
{
"description": [
"APNIC is a Regional Internet Registry.",
"We do not operate the referring network and",
"are unable to investigate complaints of network abuse.",
"For information about IRT, see www.apnic.net/irt",
"[email protected] was validated on 2020-02-03"
],
"title": "remarks"
}
],
"roles": [
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"IRT-APNIC-AP"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "Brisbane, Australia"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{
"pref": "1"
},
"text",
"[email protected]"
]
]
]
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "2008-09-04T06:51:29Z"
},
{
"eventAction": "last changed",
"eventDate": "2026-09-23T22:33:02Z"
}
],
"handle": "153.0.0.0 - 153.255.255.255",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.apnic.net/ip/153.0.0.0/8",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/153.121.0.0/18"
}
],
"name": "ERX-NETBLOCK",
"notices": [
{
"description": [
"Objects returned came from source",
"APNIC"
],
"title": "Source"
},
{
"description": [
"This is the APNIC WHOIS Database query service. The objects are in RDAP format."
],
"links": [
{
"href": "http://www.apnic.net/db/dbcopyright.html",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.apnic.net/ip/153.121.0.0/18"
}
],
"title": "Terms and Conditions"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.apnic.net/ip/153.121.0.0/18"
}
],
"title": "Whois Inaccuracy Reporting"
}
],
"objectClassName": "ip network",
"port43": "whois.apnic.net",
"rdapConformance": [
"history_version_0",
"nro_rdap_profile_0",
"cidr0",
"rdap_level_0"
],
"remarks": [
{
"description": [
"Early registration addresses"
],
"title": "description"
},
{
"description": [
"------------------------------------------------------",
"Important:",
"",
"This range was initially allocated by InterNIC prior to the",
"formation of Regional Internet Registries (RIRs). The early",
"registration transfer project (ERX) transferred these blocks",
"to be administered by each RIR based on the region in which",
"the majority of resource holders resided.",
"",
"This early registration block has been transferred to APNIC's",
"administration. However, not all of the resources under this",
"block have been transferred to APNIC.",
"",
"For information on the Early Registration Transfer (ERX)",
"project, see: http://www.apnic.net/db/erx",
"",
"------------------------------------------------------"
],
"title": "remarks"
}
],
"startAddress": "153.0.0.0",
"status": [
"administrative"
],
"type": "ALLOCATED PORTABLE"
}Frequently asked questions
What is WHOIS?
WHOIS is a public directory that answers "who is responsible for this?" for domains, IP ranges and ASNs. It lists registration dates, the registrar, nameservers and contacts.
What is RDAP, and how does it differ?
RDAP is the modern replacement for WHOIS. It returns the same records in a structured, consistent format. We query RDAP first and fall back to classic WHOIS text when a registry has not adopted it yet.
What is the difference between a registrar and a registrant?
The registrar is the company you register and manage a domain through, such as xTom or GoDaddy. The registrant is the person or organization that actually holds the domain.
What are nameservers?
Nameservers answer DNS questions for a domain and decide which IP addresses the name resolves to. They also show which DNS provider the domain uses.
What is DNSSEC?
DNSSEC adds cryptographic signatures to DNS answers so they cannot be quietly altered in transit. "Signed" means the domain has it enabled, "unsigned" means it does not.
Why is the contact information redacted?
Privacy laws such as GDPR require registrars to hide most personal details in public records. The abuse contact is usually still shown, so a domain or network can be reported when something goes wrong.