SUBNET.IM

AS27021Quest Diagnostics, Inc.

United StatesRegistryARIN

At a glance

IPv4 prefixes

17

IPv6 prefixes

0

IPv4 addresses

12.8k

IPv6 /64s

0

Upstream graph

The networks AS27021 is seen behind, one and two hops out, drawn from real AS paths.

AS27021Toward the internet core
Upstream graph for AS27021: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS27021Quest Diagnostics…This networkAS701Verizon BusinessAS3356Lumen (Level 3)AS11367WorldNet Telecomm…AS11992Liberty Mobile Pu…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS10396DATACOM CARIBE, I…AS12956Telxius (Telefoni…AS7018AT&T Enterprises,…AS23520Columbus Networks…

Networks observed one and two hops upstream of AS27021 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

9

adjacent networks

Upstreams
444%
Peers
556%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS27021
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer86080
AS701Verizon BusinessUSPeer41380
AS11367WorldNet Telecommunications, LLCPRPeer4040
AS11992Liberty Mobile Puerto Rico Inc.PRPeer3939

Prefixes

The largest blocks AS27021 originates, widest first.

Largest prefixes originated by AS27021
PrefixAddressesVisibility
216.203.80.0/204.1k80/80
216.203.80.0/212k80/80
216.203.88.0/212k79/80
216.203.92.0/221k79/80
204.235.142.0/2351280/80
65.199.254.0/2425680/80
156.30.5.0/2425679/80
156.30.24.0/2425679/80
209.242.240.0/2425679/80
209.242.241.0/2425679/80

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.