147.231.0.21
Education
Data retrieved at
Network
ASN
IP Range
Company
CESNET z.s.p.o.
Registrant
Czech Academy of Sciences
CAS-TCZ
Using networksdb.io for network lookups.
Hostname
Not available.
Type
Education
Handle
147.231.0.0 - 147.231.255.255
Registered
2006-05-18
Last Changed
2016-04-14
View raw RDAP
{
"handle": "147.231.0.0 - 147.231.255.255",
"startAddress": "147.231.0.0",
"endAddress": "147.231.255.255",
"ipVersion": "v4",
"name": "CAS-TCZ",
"type": "LEGACY",
"country": "CZ",
"parentHandle": "0.0.0.0 - 255.255.255.255",
"cidr0_cidrs": [
{
"v4prefix": "147.231.0.0",
"length": 16
}
],
"status": [
"active"
],
"entities": [
{
"handle": "AVCR1-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Akademie ved Ceske republiky Network Admins"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "Akademie ved Ceske republiky\nNarodni 3\nPraha 1\n117 20\nThe Czech Republic"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+420 221 403 111"
],
[
"tel",
{
"type": "fax"
},
"text",
"+420 224 240 572"
],
[
"email",
{
"type": "abuse"
},
"text",
"[email protected]"
],
[
"org",
{},
"text",
"ORG-AoSo1-RIPE"
]
]
],
"roles": [
"administrative",
"technical"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/AVCR1-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "ORG-AoSo1-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Czech Academy of Sciences"
],
[
"kind",
{},
"text",
"org"
],
[
"adr",
{
"label": "Czech Academy of Sciences\nAkademie ved Ceske republiky\nNarodni 3\nPraha 1\n117 20\nThe Czech Republic"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+420 221 403 111"
],
[
"tel",
{
"type": "fax"
},
"text",
"+420 224 240 512"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/ORG-AoSo1-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "RIPE-NCC-LEGACY-MNT",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"RIPE-NCC-LEGACY-MNT"
],
[
"kind",
{},
"text",
"individual"
],
[
"org",
{},
"text",
"ORG-NCC1-RIPE"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/RIPE-NCC-LEGACY-MNT"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "TENCZ-MNT",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"TENCZ-MNT"
],
[
"kind",
{},
"text",
"individual"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/TENCZ-MNT"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "AVCR1-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Akademie ved Ceske republiky Network Admins"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "Akademie ved Ceske republiky\nNarodni 3\nPraha 1\n117 20\nThe Czech Republic"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+420 221 403 111"
],
[
"tel",
{
"type": "fax"
},
"text",
"+420 224 240 572"
],
[
"email",
{
"type": "abuse"
},
"text",
"[email protected]"
],
[
"org",
{},
"text",
"ORG-AoSo1-RIPE"
]
]
],
"roles": [
"abuse"
],
"entities": [
{
"handle": "JH31557-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Jaromir Holec"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "Centre of Administration and Operations of the ASCR, v.v.i.\nAcademy of Sciences of the Czech Republic\nNarodni 3\nPrague 1\n110 00\nThe Czech Republic"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+420 266 052 826"
]
]
],
"roles": [
"administrative"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/JH31557-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "MI477-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Miroslav Indra"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "Centre of Administration and Operations of the ASCR, v.v.i.\nAcademy of Sciences of the Czech Republic\nNarodni 3\nPrague 1\n110 00\nThe Czech Republic"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+420 266 052 823"
],
[
"tel",
{
"type": "fax"
},
"text",
"+420 221 403 307"
]
]
],
"roles": [
"administrative",
"technical"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/MI477-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "ORG-AoSo1-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Czech Academy of Sciences"
],
[
"kind",
{},
"text",
"org"
],
[
"adr",
{
"label": "Czech Academy of Sciences\nAkademie ved Ceske republiky\nNarodni 3\nPraha 1\n117 20\nThe Czech Republic"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+420 221 403 111"
],
[
"tel",
{
"type": "fax"
},
"text",
"+420 224 240 512"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/ORG-AoSo1-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "PV1028-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Petr Vanicek"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "Institute of Information Theory and Automation\nAcademy of Sciences of the Czech Republic\nPod Vodarenskou vezi 4\nPrague 8 - Liben\n182 08\nThe Czech Republic"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+420 266 052 364"
],
[
"tel",
{
"type": "fax"
},
"text",
"+420 286 890 299"
]
]
],
"roles": [
"administrative",
"technical"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/PV1028-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "PV3710-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Petr Vondrasek"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "Centre of Administration and Operations of the ASCR, v.v.i.\nAcademy of Sciences of the Czech Republic\nNarodni 3\nPrague 1\n110 00\nThe Czech Republic"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+420 266 052 824"
],
[
"tel",
{
"type": "fax"
},
"text",
"+420 221 403 307"
]
]
],
"roles": [
"technical"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/PV3710-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "TENCZ-MNT",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"TENCZ-MNT"
],
[
"kind",
{},
"text",
"individual"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/TENCZ-MNT"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
}
],
"objectClassName": "entity"
}
],
"remarks": [
{
"description": [
"Praha",
"Please report network abuse -> [email protected]"
]
}
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "rdap-up",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/147.231.0.0%20-%20147.231.255.255",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "rdap-up rdap-active",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/147.231.0.0%20-%20147.231.255.255?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "rdap-down",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-down/147.231.0.0%20-%20147.231.255.255",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "rdap-top",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/147.231.0.0%20-%20147.231.255.255",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "rdap-top rdap-active",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/147.231.0.0%20-%20147.231.255.255?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "rdap-bottom",
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-bottom/147.231.0.0%20-%20147.231.255.255",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "self",
"href": "https://rdap.db.ripe.net/ip/147.231.0.21",
"type": "application/rdap+json"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "2006-05-18T10:46:16Z"
},
{
"eventAction": "last changed",
"eventDate": "2016-04-14T08:33:34Z"
}
],
"rdapConformance": [
"geofeed1",
"rirSearch1",
"ips",
"cidr0",
"rdap_level_0",
"nro_rdap_profile_0",
"redacted"
],
"notices": [
{
"title": "Filtered",
"description": [
"This output has been filtered."
]
},
{
"title": "Whois Inaccuracy Reporting",
"description": [
"If you see inaccuracies in the results, please visit:"
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "inaccuracy-report",
"href": "https://www.ripe.net/contact-form?topic=ripe_dbm&show_form=true",
"type": "text/html"
}
]
},
{
"title": "Source",
"description": [
"Objects returned came from source",
"RIPE"
]
},
{
"title": "Terms and Conditions",
"description": [
"This is the RIPE Database query service. The objects are in RDAP format."
],
"links": [
{
"value": "https://rdap.db.ripe.net/ip/147.231.0.21",
"rel": "terms-of-service",
"href": "http://www.ripe.net/db/support/db-terms-conditions.pdf",
"type": "application/pdf"
}
]
}
],
"port43": "whois.ripe.net",
"objectClassName": "ip network",
"redacted": [
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='AVCR1-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
},
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='ORG-AoSo1-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
},
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='AVCR1-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
}
]
}
Security
No security threats detected for this IP.
VPN
Proxy
Tor
Hosting
Residential Proxy
Bogon
Abuser
Crawler
RPKI
RPKI Origin Validation
RPKI verifies that an IP prefix is legitimately announced by the authorized Autonomous System (ASN) using Route Origin Authorizations (ROAs).
Valid.
This prefix is correctly authorized by a valid ROA.
VALID
Validated Prefix
147.231.0.0/16
Authorized ASN
AS2852
Abuse Contacts
IP Geolocation
Country
Czechia
City
Prague (๐ 110 00)
Prague
Time Zone
Europe/Prague
Coordinates
50.0883, 14.4124
Continent
Europe
European Union
Yes.
Phone prefix
+420
Currency
Czech Koruna (CZK Kฤ)