AS263990
FASTNET COMUNICACAO EIRELI - ME
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 →Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 143.0.16.0/22 | 1.0K |
94.2%
|
FASTNET COMUNICACAO EIRELI - ME | BR | São Paulo | Santo André |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS263990 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 |
|---|---|---|
| 143.0.16.0/22 | 37,635 | 2026-08-04 22:42:19 |
| 143.0.18.0/23 | 37,435 | 2026-08-04 22:42:19 |
| 143.0.16.0/23 | 37,210 | 2026-08-04 22:42:19 |
| 143.0.16.0/24 | 562 | 2026-07-03 15:13:17 |
| 143.0.19.0/24 | 554 | 2026-07-03 15:13:17 |
| 143.0.17.0/24 | 546 | 2026-07-03 15:13:17 |
| 143.0.18.0/24 | 543 | 2026-07-03 15:13:17 |
Frequently Asked Questions
What is AS263990?
AS263990 is an Autonomous System Number assigned to FASTNET COMUNICACAO EIRELI - ME. 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 AS263990 announce?
AS263990 announces 1.0K IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Brazil.
Who operates AS263990?
AS263990 is operated by FASTNET COMUNICACAO EIRELI - ME. The organization is based in Brazil. You can view all IP ranges and related ASNs on the organization page.
What country is AS263990 registered in?
AS263990 is registered in Brazil. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
