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Network report

Who holds an IP address, prefix or AS number, how it is routed (origin AS, RPKI, IRR), its reverse DNS, blocklist listings and PeeringDB record, with what to fix first.

IP address, prefix or AS number

AS1237 · 

curl -s "https://thenetworkery.com/api/v1/network-report?query=AS1237"
JSON Docs

Warning: AS1237 (KREONET-AS-KR-KR) announces 211 IPv4 and 1 IPv6 prefixes. 2 warnings

AS pageAS1237
HolderKREONET-AS-KR-KR - KISTI
AllocationAPNIC, South Korea (KR), allocated 2002-08-01
Prefixes (IPv4 / IPv6)211 / 1
RPKI valid96% (204 / 212)
Upstreams and peers4
Peering policyOpen

What to fix

  1. Warning

    8 of 212 announced prefixes have no ROA (RPKI not found): 147.47.120.0/21, 147.47.124.0/24, 147.47.125.0/24, 202.31.182.0/24, 211.213.190.0/24 (+3).

    Without a ROA, networks cannot tell your routes from a hijack.

    Fix: Create a ROA for each at your RIR portal, with origin AS1237 and a max length equal to the prefix length:

    147.47.120.0/21 AS1237 max-length /21
147.47.124.0/24 AS1237 max-length /24
147.47.125.0/24 AS1237 max-length /24
202.31.182.0/24 AS1237 max-length /24
211.213.190.0/24 AS1237 max-length /24
218.233.7.0/24 AS1237 max-length /24
218.234.156.0/24 AS1237 max-length /24
2001:320::/32 AS1237 max-length /32

    Open in RPKI / ROA validator Guide

  2. Warning

    No public NOC, policy or technical contact.

    Other networks use these addresses to set up peering and to reach you during an incident.

    Fix: Add a role contact (for example noc@ or peering@ an address you monitor) with visibility Public.

    Open in PeeringDB lookup

Checks

Routing and RPKI 8 of 212 announced prefixes have no ROA (RPKI not found): 147.47.120.0/21, 147.47.124.0/24, 147.47.125.0/24, 202.31.182.0/24, 211.213.190.0/24 (+3).
  • Pass: AS1237 announces 211 IPv4 and 1 IPv6 prefixes.
  • Warning: 8 of 212 announced prefixes have no ROA (RPKI not found): 147.47.120.0/21, 147.47.124.0/24, 147.47.125.0/24, 202.31.182.0/24, 211.213.190.0/24 (+3).
  • Info: 204 of 212 announced prefixes are RPKI valid.
  • Pass: Every announced prefix has an IRR route object.
  • Info: 4 upstreams and peers, 42 downstream networks seen.
HolderKREONET-AS-KR-KR - KISTI
IPv4 prefixes211
IPv6 prefixes1
RPKI204 valid · 8 not found
Downstream networks42
Routes to fix
PrefixRPKI
147.47.120.0/21 No ROA
147.47.124.0/24 No ROA
147.47.125.0/24 No ROA
202.31.182.0/24 No ROA
211.213.190.0/24 No ROA
218.233.7.0/24 No ROA
218.234.156.0/24 No ROA
2001:320::/32 No ROA

Upstreams and peers seen to the left 4

AS17579 Korea Institute of Science and Technolo… AS4766 KT AS399861 MOBITE-NET AS9318 SK Broadband

Announced prefixes 212

134.75.0.0/16 134.75.20.0/24 134.75.52.0/23 134.75.250.0/24 147.47.120.0/21 147.47.124.0/24 147.47.125.0/24 150.183.0.0/16 150.183.11.0/24 202.30.40.0/22 202.30.60.0/22 202.31.182.0/24 203.230.0.0/24 203.230.2.0/24 203.230.3.0/24 203.230.6.0/24 203.230.7.0/24 203.230.8.0/22 203.230.16.0/23 203.230.22.0/23 203.230.24.0/21 203.230.60.0/22 203.230.64.0/21 203.230.72.0/24 203.230.73.0/24 203.230.74.0/23 203.230.76.0/22 203.230.108.0/22 203.230.116.0/23 203.230.116.0/24 203.230.120.0/24 203.230.126.0/24 203.233.155.0/24 203.233.156.0/24 203.241.40.0/21 203.241.116.0/23 203.241.118.0/24 203.241.120.0/22 203.241.164.0/24 203.241.165.0/24 203.241.169.0/24 203.241.170.0/23 203.241.172.0/23 203.241.174.0/24 203.247.64.0/24 203.247.69.0/24 203.247.73.0/24 203.247.160.0/22 203.247.164.0/23 203.247.167.0/24 203.247.170.0/23 203.247.172.0/22 203.247.176.0/22 203.247.180.0/23 203.247.184.0/24 203.247.185.0/24 203.247.187.0/24 203.247.188.0/24 203.247.190.0/23 203.247.192.0/20 203.247.216.0/22 203.250.0.0/19 203.250.96.0/21 203.250.110.0/24 203.250.112.0/21 203.250.155.0/24 203.250.156.0/22 203.250.156.0/24 203.250.160.0/21 203.250.172.0/22 203.250.176.0/21 203.250.182.0/24 203.250.183.0/24 203.250.192.0/18 203.253.96.0/20 203.253.135.0/24 203.253.136.0/22 203.253.140.0/22 203.253.224.0/23 203.253.226.0/24 203.253.230.0/23 203.253.234.0/23 203.253.236.0/24 203.253.238.0/24 203.254.40.0/24 203.254.168.0/23 203.254.175.0/24 203.254.176.0/20 203.254.179.0/24 203.254.180.0/24 203.254.181.0/24 203.254.185.0/24 203.254.186.0/24 210.98.5.0/24 210.98.6.0/23 210.98.8.0/22 210.98.12.0/24 210.98.14.0/23 210.98.24.0/23 210.98.26.0/24

Showing the first 100.

Source: RIPEstat (RIPE NCC RIS, Routinator, IRR); AS names: Team Cymru

Open in ASN & BGP prefix lookup
Registration Found at rdap.arin.net.
  • Pass: Found at rdap.arin.net.
NameKREONET-AS-KR-KR
HandleAS1237
RangeAS1237
CountryKR
Statusactive
Abuse contacthostmaster@nic.or.kr
Allocation
Registry (RIR)APNIC
CountrySouth Korea (KR)
Delegated on2002-08-01
StatusAllocated
Delegated rangeAS1237

Source: RIR delegation data, updated daily. The country is where the range was registered, not necessarily where it is used.

Contacts
RoleNameEmail
abuse IRT-KRNIC-KR hostmaster@nic.or.kr
administrative AS Manager noc@kreonet.net
technical AS Manager noc@kreonet.net

Source: https://rdap.arin.net/registry/autnum/1237. Registration data from rdap.arin.net, shown under its terms of use (terms): not for marketing or bulk collection.

Open in WHOIS / RDAP lookup
PeeringDB No public NOC, policy or technical contact.
  • Pass: AS1237 is in PeeringDB as KREONET.
  • Info: Peering policy: Open.
  • Info: Present at 1 internet exchanges with 1 ports (0M in total).
  • Warning: No public NOC, policy or technical contact.
NetworkKREONET
AS numberAS1237
TypeEducational/Research, Regional
Websitehttp://kreonet.net
IRR as-setRADB::AS1237:AS-KREONET
Prefixes (IPv4 / IPv6)1000 / 50
Traffic50-100Gbps, Balanced
Peering policyOpen
LocationsNot Required
Ratio requiredNo
ContractsNot Required
Last updated2026-11-02

Source: PeeringDB. Results are cached for an hour.

Open in PeeringDB lookup