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
- Multiple-origin (MOAS) routing anomaly −12
- Mobile allocation +2
- Trust score 55 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 1 MOAS prefix — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS37303 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 197.148.140.0/24 | AS37303, AS327708 | 2026-07-23 04:08:26 |
Network profile
Source: PeeringDB →Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS37303 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 |
|---|---|---|
| 41.77.17.0/24 | 48,369 | 2026-07-23 20:04:52 |
| 197.148.128.0/24 | 46,994 | 2026-07-23 20:04:54 |
| 41.77.20.0/24 | 45,182 | 2026-07-23 20:04:47 |
| 41.77.19.0/24 | 44,967 | 2026-07-23 20:04:52 |
| 197.148.191.0/24 | 44,700 | 2026-07-23 20:04:47 |
| 197.148.190.0/24 | 44,698 | 2026-07-23 20:04:47 |
| 197.148.187.0/24 | 44,658 | 2026-07-23 20:04:52 |
| 197.148.152.0/24 | 44,651 | 2026-07-23 20:04:51 |
| 197.148.156.0/24 | 44,651 | 2026-07-23 20:04:46 |
| 197.148.159.0/24 | 44,626 | 2026-07-23 20:04:49 |
| 41.77.21.0/24 | 44,621 | 2026-07-23 20:04:47 |
| 197.148.153.0/24 | 44,609 | 2026-07-23 20:04:52 |
| 197.148.150.0/24 | 44,598 | 2026-07-23 20:04:52 |
| 197.148.157.0/24 | 44,595 | 2026-07-23 20:04:47 |
| 197.148.188.0/24 | 44,592 | 2026-07-23 20:04:52 |
| 197.148.151.0/24 | 44,582 | 2026-07-23 20:04:52 |
| 197.148.179.0/24 | 44,571 | 2026-07-23 20:04:52 |
| 197.148.154.0/24 | 44,558 | 2026-07-23 20:04:52 |
| 197.148.148.0/24 | 44,554 | 2026-07-23 20:04:52 |
| 197.148.155.0/24 | 44,547 | 2026-07-23 20:04:52 |
| 197.148.182.0/24 | 44,535 | 2026-07-23 20:04:52 |
| 197.148.147.0/24 | 44,529 | 2026-07-23 20:04:52 |
| 197.148.186.0/24 | 44,528 | 2026-07-23 20:04:52 |
| 197.148.180.0/24 | 44,517 | 2026-07-23 20:04:52 |
| 197.148.146.0/24 | 44,516 | 2026-07-23 20:04:52 |
| 197.148.184.0/24 | 44,507 | 2026-07-23 20:04:52 |
| 197.148.183.0/24 | 44,505 | 2026-07-23 20:04:52 |
| 197.148.158.0/24 | 44,505 | 2026-07-23 20:04:49 |
| 197.148.149.0/24 | 44,503 | 2026-07-23 20:04:52 |
| 197.148.177.0/24 | 44,502 | 2026-07-23 20:04:52 |
| 197.148.173.0/24 | 44,499 | 2026-07-23 20:04:52 |
| 197.148.160.0/24 | 44,498 | 2026-07-23 20:04:51 |
| 197.148.185.0/24 | 44,498 | 2026-07-23 20:04:52 |
| 197.148.189.0/24 | 44,486 | 2026-07-23 20:04:52 |
| 197.148.143.0/24 | 44,486 | 2026-07-23 20:04:52 |
| 197.148.181.0/24 | 44,484 | 2026-07-23 20:04:52 |
| 197.148.145.0/24 | 44,473 | 2026-07-23 20:04:52 |
| 197.148.165.0/24 | 44,472 | 2026-07-23 20:04:52 |
| 197.148.175.0/24 | 44,463 | 2026-07-23 20:04:52 |
| 197.148.163.0/24 | 44,460 | 2026-07-23 20:04:52 |
| 197.148.171.0/24 | 44,453 | 2026-07-23 20:04:52 |
| 197.148.164.0/24 | 44,449 | 2026-07-23 20:04:52 |
| 197.148.144.0/24 | 44,448 | 2026-07-23 20:04:52 |
| 197.148.166.0/24 | 44,437 | 2026-07-23 20:04:52 |
| 197.148.170.0/24 | 44,437 | 2026-07-23 20:04:52 |
| 197.148.138.0/24 | 44,432 | 2026-07-23 20:04:52 |
| 197.148.167.0/24 | 44,419 | 2026-07-23 20:04:52 |
| 197.148.137.0/24 | 44,415 | 2026-07-23 20:04:52 |
| 197.148.178.0/24 | 44,408 | 2026-07-23 20:04:52 |
| 197.148.176.0/24 | 44,401 | 2026-07-23 20:04:52 |
Showing top 50 of 67 announced prefixes by sample volume.
Frequently Asked Questions
What is AS37303?
AS37303 is an Autonomous System Number assigned to Airtel Madagascar. 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 AS37303 announce?
AS37303 announces 16.6K IPv4 addresses distributed across 15 routed CIDR prefixes. The network is registered in Madagascar.
Who operates AS37303?
AS37303 is operated by Airtel Madagascar. The organization is based in Madagascar. You can view all IP ranges and related ASNs on the organization page.
What country is AS37303 registered in?
AS37303 is registered in Madagascar. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
