ResearchRouting table, RPKI, IRR & looking glass

AS203 Level 3 Parent, LLC

AS203 (CENTURYLINK-LEGACY-LVLT-203) is registered to Level 3 Parent, LLC in US. It originates 143 prefixes in the global routing table.

143
IPv4 prefixes
0
IPv6 prefixes
246,208
IPv4 addresses
5%
RPKI valid
Registration

Who holds AS203

Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.

AS number
AS203
Handle
CENTURYLINK-LEGACY-LVLT-203
Organization
Level 3 Parent, LLC
Country
US
ASPA
None published
Routing

What AS203 announces

Prefixes originated by AS203 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
143
IPv6 prefixes
0
IPv4 addresses
246,208 (961 /24s)
RPKI valid
8 5%
RPKI invalid
2
RPKI not found
133
ROAs naming AS203
889
With an IRR route object
4 2%
Prefixes

Announced prefixes

Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.

IPv4 (143)
4.4.61.192/264.31.172.128/254.34.203.128/254.43.86.0/254.43.87.0/254.43.138.192/264.43.139.0/268.7.155.0/248.15.229.0/248.18.63.0/248.20.69.0/248.25.26.0/248.44.205.0/2438.107.240.0/2462.67.221.0/2662.67.222.0/2463.128.0.0/2263.128.1.0/2463.128.7.0/2463.128.8.0/2263.128.12.0/2463.128.14.0/2463.128.19.0/2763.128.20.0/2463.128.24.0/2463.146.183.128/2663.175.205.0/2463.233.90.0/2464.14.182.128/2564.22.148.0/2464.208.127.0/2464.209.141.0/2464.210.246.0/2464.241.120.0/2464.241.121.0/2465.141.182.128/2766.7.8.0/2666.162.113.64/2666.162.113.128/2767.135.189.192/27128.177.179.0/24143.112.0.0/17143.112.68.0/22143.112.128.0/18143.112.128.0/22143.112.144.0/22143.112.192.0/19143.199.28.0/24143.199.96.0/24143.199.109.0/24143.199.135.0/24143.199.140.0/23143.199.222.0/24148.59.168.0/24149.21.0.0/16156.42.0.0/19156.42.32.0/19156.42.64.0/19156.42.96.0/19156.42.128.0/19156.42.160.0/19156.42.192.0/19156.42.224.0/19158.120.127.0/24161.209.96.0/24161.209.97.0/24161.209.98.0/24161.209.99.0/24161.209.100.0/24161.209.101.0/24161.209.102.0/24161.209.103.0/24161.209.111.0/24161.209.192.0/19161.209.225.0/24165.236.67.224/27165.236.97.0/27170.22.90.0/24189.125.51.0/24192.26.214.0/24192.42.110.0/24192.147.2.0/24195.122.189.64/26198.200.148.0/24199.227.129.64/26204.146.159.0/24204.153.154.0/23205.139.102.0/24205.139.103.0/24205.139.104.0/22205.139.108.0/24205.168.77.128/27206.79.6.0/24206.79.194.64/27206.169.67.0/24206.203.64.0/18206.227.192.0/24206.227.193.0/24206.227.194.0/24206.227.195.0/24206.227.196.0/24206.227.199.0/24206.227.200.0/24206.227.205.0/24206.227.206.0/24206.227.208.0/24206.227.209.0/24206.227.210.0/24206.227.211.0/24206.227.216.0/23206.227.220.0/23206.227.223.0/24206.227.226.0/24206.227.227.0/24206.227.229.0/24206.227.233.0/24206.227.235.0/24209.67.132.0/22209.67.136.0/22209.164.208.0/24
Show 23 more
209.164.209.0/24209.164.211.0/24209.164.211.0/25209.164.220.0/24209.164.221.0/24209.164.223.0/24212.3.242.64/26216.32.151.0/24216.33.116.64/27216.33.160.0/24216.84.177.96/27216.114.73.0/24216.142.202.128/26216.142.204.0/26216.163.248.0/24216.163.249.0/24216.163.250.0/24216.163.251.0/24216.163.252.0/24216.163.253.0/24216.163.254.0/24216.163.255.0/24216.235.200.0/21

RPKI valid   RPKI invalid   no ROA covers it

Upstreams

Who AS203 buys transit from

Inferred from the AS paths in the RouteViews tables, refreshed every 4 hours, most-seen first. 1 upstream.

AS3356 LEVEL3
Downstreams

Who buys transit from AS203

None seen: AS203 does not appear to provide transit to anyone.

IRR

Routing registry objects

From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.

Route objects with origin AS203: ARIN 57 · RIPE 25 · LACNIC 18 · RADB 9

as-sets that list AS203 (3)
AS-LUMEN-ASNSAS-LUMEN-CUSTOMERS-ASNSAS262288:AS-UPSTREAMS
Tools

Check AS203 live

ASN lookup and WHOISRPKI validatorASPA validatorIRR lookup