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
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 1 internet exchange: Equinix Singapore
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 168.100.128.0/19 | 8.2K |
21.7%
|
Ahrefs Pte Ltd | SG | — | — |
| 168.100.144.0/20 | 4.1K |
0.0%
|
Ahrefs Pte Ltd | US | Virginia | Ashburn |
| 168.100.128.0/21 | 2.0K |
0.0%
|
Ahrefs Pte Ltd | SG | — | — |
| 61.16.24.0/22 | 1.0K |
41.9%
|
Ahrefs Pte Ltd | SG | — | — |
| 168.100.136.0/22 | 1.0K |
0.0%
|
Ahrefs Pte Ltd | SG | — | — |
| 168.100.140.0/22 | 1.0K |
0.0%
|
Ahrefs Pte Ltd | GB | England | Woking |
| 202.8.40.0/22 | 1.0K |
95.3%
|
Ahrefs Pte Ltd | SG | — | — |
| 103.150.140.0/23 | 512 |
45.5%
|
Ahrefs Pte Ltd | SG | — | — |
| 202.94.84.0/23 | 512 |
1.0%
|
Ahrefs Pte Ltd | SG | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS140577 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 |
|---|---|---|
| 61.16.24.0/22 | 6,740 | 2026-07-29 21:35:22 |
| 168.100.140.0/22 | 6,491 | 2026-07-29 21:35:22 |
| 168.100.136.0/22 | 5,889 | 2026-07-29 21:35:22 |
| 202.94.84.0/23 | 5,882 | 2026-07-29 21:35:22 |
| 103.150.140.0/23 | 5,859 | 2026-07-29 21:35:31 |
| 168.100.128.0/21 | 5,858 | 2026-07-29 21:35:22 |
| 168.100.144.0/20 | 5,509 | 2026-07-29 21:37:48 |
| 168.100.146.0/23 | 5,476 | 2026-07-29 21:36:41 |
| 168.100.148.0/24 | 5,431 | 2026-07-29 21:35:22 |
| 202.8.40.0/22 | 5,193 | 2026-07-29 21:05:07 |
| 202.8.40.0/23 | 4,986 | 2026-07-29 21:05:07 |
| 202.8.42.0/23 | 4,960 | 2026-07-29 21:05:07 |
| 168.100.142.0/24 | 85 | 2026-05-26 18:57:18 |
Frequently Asked Questions
What is AS140577?
AS140577 is an Autonomous System Number assigned to Ahrefs Pte Ltd. 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 AS140577 announce?
AS140577 announces 11.3K IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in Singapore.
Who operates AS140577?
AS140577 is operated by Ahrefs Pte Ltd. The organization is based in Singapore. You can view all IP ranges and related ASNs on the organization page.
What country is AS140577 registered in?
AS140577 is registered in Singapore. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
