AS40128Morristown Utility Systems
United StatesRegistryARINAs of 24th October 2026, AS40128 (Morristown Utility Systems), a network registered in the United States with ARIN, originates 8 IPv4 prefixes covering 19.5k addresses. By IPv4 address space that makes it the 7,191st-largest of the 79,671 networks we see originating IPv4, and the 2,347th-largest of 18,487 in the United States. It is seen behind 8 upstream networks, most often AS2914 (NTT America, Inc.) and AS14016 (Capcon Networks), and in front of 6 downstream networks. 13% 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
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS40128 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS40128 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
55
adjacent networks
- Upstreams
- 815%
- Peers
- 4175%
- Downstreams
- 611%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS2914NTT America, Inc. | US | Peer | 915 | 76 |
| AS14016Capcon Networks | US | Peer | 157 | 19 |
| AS6939Hurricane Electric LLC | US | Peer | 32 | 5 |
| AS24482SG.GS |  SG | Peer | 12 | 2 |
| AS7195EdgeUno |  CO | Peer | 8 | 1 |
| AS35280F5 Networks SARL |  FR | Peer | 8 | 1 |
| AS49544i3D.net B.V |  NL | Peer | 8 | 1 |
| AS13786Seaborn (Seabras USA, LLC) | US | Peer | 8 | 1 |
Prefixes
The largest blocks AS40128 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 38.137.64.0/19 | 8.2k | 76/76 |
| 63.246.240.0/21 | 2k | 76/76 |
| 63.246.248.0/21 | 2k | 76/76 |
| 68.170.96.0/21 | 2k | 76/76 |
| 68.170.104.0/21 | 2k | 76/76 |
| 38.95.220.0/22 | 1k | 76/76 |
| 162.213.176.0/22 | 1k | 76/76 |
| 204.141.80.0/22 | 1k | 76/76 |
Routing health
How AS40128'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
- Valid12.5%1
- Invalid0.0%0
- No ROA87.5%7
Propagation
- Globally propagated90% of full-feed peers or more100.0%8
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 8 prefixes
Recent changes
Announcements that started or stopped since 24th Sept 2026.
No announcement by AS40128 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.