AS12303 Magyarorszagi Internet Szolgaltatok Tanacsa Tudomanyos Egyesulet
AS12303 (ISZT-AS) is registered to Magyarorszagi Internet Szolgaltatok Tanacsa Tudomanyos Egyesulet in HU, through RIPE. It originates 2 prefixes in the global routing table.
1
IPv4 prefixes
1
IPv6 prefixes
1,024
IPv4 addresses
0%
RPKI valid
Registration
Who holds AS12303
Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.
AS number
AS12303
Handle
ISZT-AS
Organization
Magyarorszagi Internet Szolgaltatok Tanacsa Tudomanyos Egyesulet
Country
HU
Registry
RIPE
ASPA
None published
WHOIS recordRIPE
% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html
% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.
% Information related to 'AS12288 - AS12454'
as-block: AS12288 - AS12454
descr: RIPE NCC ASN block
remarks: These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by: RIPE-NCC-HM-MNT
created: 2018-11-22T15:27:24Z
last-modified: 2018-11-22T15:27:24Z
source: RIPE
% Information related to 'AS12303'
% Abuse contact for 'AS12303' is 'abuse@nic.hu'
aut-num: AS12303
as-name: ISZT-AS
descr: ISZT Nonprofit Kft.
descr: Blathy Otto utca 9.
descr: H-1089 Budapest
descr: Hungary
org: ORG-MIST1-RIPE
remarks: Upstreams
remarks: ---------
mp-import: afi ipv6.unicast from AS5507 accept AS-BIX-V6
mp-export: afi ipv6.unicast to AS5507 announce AS-ISZT
mp-import: afi ipv6.unicast from AS62214 accept ANY
mp-export: afi ipv6.unicast to AS62214 announce AS-ISZT
mp-import: afi ipv6.unicast from AS29278 accept ANY
mp-export: afi ipv6.unicast to AS29278 announce AS-ISZT
import: from AS5507 accept AS-BIX
export: to AS5507 announce AS-ISZT
import: from AS62214 accept ANY
export: to AS62214 announce AS-ISZT
import: from AS29278 accept ANY
export: to AS29278 announce AS-ISZT
remarks: Services
remarks: --------
import: from AS42909 accept { 194.0.1.0/24 }
import: from AS42909 accept { 194.0.2.0/24 }
export: to AS42909 announce AS-BIX
import: from AS25152 accept { 193.0.14.0/24 }
export: to AS25152 announce AS-BIX
import: from AS1921 accept { 194.0.25.0/24 }
import: from AS1921 accept { 192.174.68.0/24 }
import: from AS1921 accept { 176.97.158.0/24 }
import: from AS1921 accept { 91.237.67.0/24 }
import: from AS1921 accept { 185.167.176.0/24 }
import: from AS1921 accept { 193.227.117.0/24 }
import: from AS1921 accept { 194.50.187.0/24 }
import: from AS1921 accept { 194.0.182.0/24 }
import: from AS1921 accept { 185.80.188.0/22 }
import: from AS1921 accept { 193.46.128.0/22 }
import: from AS1921 accept { 193.46.132.0/23 }
import: from AS1921 accept { 193.46.134.0/24 }
import: from AS1921 accept { 193.46.135.0/24 }
import: from AS1921 accept { 194.0.26.0/24 }
import: from AS1921 accept { 194.0.24.0/24 }
export: to AS1921 announce AS-BIX
member-of: AS3320:AS-AUTH-PILOT-BLACKHOLE-FROM-AS5483
admin-c: JZ1170-RIPE
tech-c: JZ1170-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: HU-NIC-MNT
mnt-by: AS5507-MNT
created: 2005-06-14T09:03:41Z
last-modified: 2026-06-22T11:18:49Z
source: RIPE
organisation: ORG-MIST1-RIPE
org-name: Magyarorszagi Internet Szolgaltatok Tanacsa Tudomanyos Egyesulet
country: HU
reg-nr: 01-02-0007581
org-type: LIR
address: Blathy Otto utca 9.
address: 1089
address: Budapest
address: HUNGARY
phone: +36 30 626 6745
admin-c: ANGE11-RIPE
tech-c: ANGE11-RIPE
abuse-c: AR56674-RIPE
mnt-ref: AS5507-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: AS5507-MNT
created: 2019-11-12T11:19:14Z
last-modified: 2026-06-22T10:35:18Z
source: RIPE # Filtered
person: Janos Zsako
address: ISZT Nonprofit Kft.
address: Blathy Otto u. 9.
address: 1089 Budapest
address: Hungary
phone: +36 1 238 0115
nic-hdl: JZ1170-RIPE
mnt-by: ISZT-MNT
created: 2012-04-03T09:21:56Z
last-modified: 2026-04-10T13:02:33Z
source: RIPE # Filtered
% This query was served by the RIPE Database Query Service version 1.124.1 (ABERDERouting
What AS12303 announces
Prefixes originated by AS12303 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).
IPv4 prefixes
1
IPv6 prefixes
1
IPv4 addresses
1,024 (4 /24s)
RPKI valid
0 0%
RPKI invalid
0
RPKI not found
2
ROAs naming AS12303
1
With an IRR route object
2 100%
Prefixes
Announced prefixes
Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.
Neighbors
Who AS12303 is reached through
The AS just before AS12303 in the paths our looking glass collectors hold, for 2 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.
IRR
Routing registry objects
From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.
| Source | as-name | Maintained by |
|---|---|---|
| RIPE | ISZT-AS | RIPE-NCC-END-MNT, HU-NIC-MNT, AS5507-MNT |
Route objects with origin AS12303: RIPE 5
as-sets that list AS12303 (10)