Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Government allocation +8
- Trust score 73 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 1 internet exchange: MASS-IX: ISP Peering LAN
AS27370 — global IP footprint
Cities where AS27370 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 140.241.0.0/16 | 65.5K |
0.0%
|
City of Boston | US | Massachusetts | Boston |
| 216.163.208.0/20 | 4.1K |
0.4%
|
City of Boston | US | Massachusetts | Boston |
| 192.80.65.0/24 | 256 |
0.8%
|
City of Boston | US | Massachusetts | Boston |
| 204.167.88.0/24 | 256 |
0.0%
|
City of Boston | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS27370 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 204.167.88.0/24 | 9,724 | 2026-07-18 10:53:02 |
| 140.241.14.0/24 | 8,790 | 2026-07-18 12:19:17 |
| 216.163.216.0/21 | 6,911 | 2026-07-18 12:15:48 |
| 216.163.208.0/20 | 6,863 | 2026-07-18 12:19:16 |
| 140.241.244.0/24 | 6,836 | 2026-07-18 12:28:29 |
| 140.241.0.0/16 | 5,956 | 2026-07-18 12:15:47 |
| 192.80.65.0/24 | 5,815 | 2026-07-18 12:17:32 |
| 140.241.25.0/24 | 4,409 | 2026-07-18 12:15:55 |
| 140.241.86.0/24 | 4,397 | 2026-07-18 12:17:20 |
| 140.241.250.0/24 | 4,392 | 2026-07-18 12:19:53 |
| 216.163.216.0/22 | 4,383 | 2026-07-18 12:15:47 |
| 140.241.3.0/24 | 4,375 | 2026-07-18 12:29:54 |
| 216.163.220.0/22 | 4,373 | 2026-07-18 12:18:25 |
| 216.163.208.0/21 | 4,358 | 2026-07-18 12:19:00 |
Frequently Asked Questions
What is AS27370?
AS27370 is an Autonomous System Number assigned to City of Boston. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS27370 announce?
AS27370 announces 70.1K IPv4 addresses distributed across 4 routed CIDR prefixes. The network is registered in United States.
Who operates AS27370?
AS27370 is operated by City of Boston. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS27370 registered in?
AS27370 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
