subnet.im

AS16871McDonagh Bros. Inc.

United StatesRegistryARIN

As of 27th September 2026, AS16871 (McDonagh Bros. Inc.), a network registered in the United States with ARIN, originates 6 IPv4 prefixes covering 1.8k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 29,817th-largest of the 79,523 networks we see originating IPv4, and the 6,814th-largest of 18,427 in the United States. It is seen behind 3 upstream networks, most often AS209 (Lumen (ex. Qwest)) and AS6939 (Hurricane Electric LLC). 29% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

6

IPv6 prefixes

1

IPv4 addresses

1.8k

IPv6 /64s

65.5k

Upstream graph

The networks AS16871 is seen behind, one and two hops out, drawn from real AS paths.

AS16871Toward the internet core
Upstream graph for AS16871: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS16871McDonagh Bros. In…This networkAS174Cogent Communicat…AS209Lumen (ex. Qwest)AS6939Hurricane Electri…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS3356Lumen (Level 3)AS18106Viewqwest Pte LtdAS20130Depaul University

Networks observed one and two hops upstream of AS16871 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

7

adjacent networks

Upstreams
343%
Peers
457%
Downstreams
00%

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

Upstreams of AS16871
NetworkCountryRelationshipPathsVantage pts
AS209Lumen (ex. Qwest)USPeer24381
AS6939Hurricane Electric LLCUSPeer219141
AS174Cogent Communications, LLCUSPeer8080

Prefixes

The largest blocks AS16871 originates, widest first.

Largest prefixes originated by AS16871
PrefixAddressesVisibility
63.231.200.0/2351278/81
63.231.196.0/2425681/81
63.231.197.0/2425681/81
63.231.198.0/2425681/81
63.231.199.0/2425678/81
206.130.65.0/2425680/81
2001:470:8a::/4865.5k × /6463/64

Routing health

How AS16871's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid28.6%2
  • Invalid0.0%0
  • No ROA71.4%5

Propagation

  • Globally propagated90% of full-feed peers or more100.0%7
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 6 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS16871 started or stopped in this period.

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