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
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 11 internet exchanges: IX.br (PTT.br) São Paulo: ATM/MPLA, IX.br (PTT.br) Belo Horizonte: ATM/MPLA, IX.br (PTT.br) Rio de Janeiro: ATM/MPLA, DE-CIX Frankfurt: DE-CIX Frankfurt Peering LAN, IX.br (PTT.br) Curitiba: ATM/MPLA, IX.br (PTT.br) Fortaleza: ATM/MPLA, IX.br (PTT.br) Porto Alegre: ATM/MPLA, IX.br (PTT.br) Florianópolis: ATM/MPLA, IX.br (PTT.br) Campinas: ATM/MPLA, Equinix São Paulo: Equinix IX - SP Metro, …
AS21574 — global IP footprint
Cities where AS21574 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 |
|---|---|---|---|---|---|---|
| 186.249.224.0/20 | 4.1K |
56.0%
|
Century Telecom Ltda | BR | Minas Gerais | Belo Horizonte |
| 187.1.176.0/20 | 4.1K |
90.5%
|
Century Telecom Ltda | BR | Minas Gerais | Belo Horizonte |
| 200.169.0.0/20 | 4.1K |
76.5%
|
Century Telecom Ltda | BR | Minas Gerais | Belo Horizonte |
| 168.227.200.0/22 | 1.0K |
27.8%
|
Century Telecom Ltda | BR | Minas Gerais | Belo Horizonte |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS21574 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 |
|---|---|---|
| 187.1.176.0/24 | 34,371 | 2026-07-28 10:14:13 |
| 187.1.176.0/20 | 30,793 | 2026-07-28 10:14:13 |
| 200.169.0.0/20 | 30,745 | 2026-07-28 10:14:13 |
| 186.249.224.0/20 | 29,739 | 2026-07-28 10:14:13 |
| 168.227.200.0/22 | 27,127 | 2026-07-28 10:14:13 |
| 168.227.200.0/23 | 23,964 | 2026-07-21 12:08:45 |
| 168.227.202.0/23 | 23,812 | 2026-07-21 12:08:45 |
| 187.1.178.0/24 | 15,120 | 2026-07-28 10:04:10 |
| 200.169.4.0/22 | 11,340 | 2026-07-21 12:09:03 |
| 200.169.2.0/24 | 10,892 | 2026-07-21 12:09:03 |
| 200.169.3.0/24 | 10,884 | 2026-07-21 12:09:03 |
| 200.169.1.0/24 | 10,880 | 2026-07-21 12:09:03 |
| 186.249.232.0/21 | 8,653 | 2026-07-21 12:09:37 |
| 186.249.224.0/21 | 8,649 | 2026-07-21 12:09:37 |
| 200.169.8.0/21 | 8,532 | 2026-07-21 12:09:03 |
| 187.1.176.0/21 | 8,194 | 2026-07-21 12:09:37 |
| 187.1.184.0/21 | 8,193 | 2026-07-21 12:09:37 |
| 186.249.229.0/24 | 6,754 | 2026-06-25 19:03:46 |
| 200.169.8.0/24 | 3,003 | 2026-07-19 13:38:33 |
| 131.221.159.0/24 | 785 | 2026-06-16 20:01:24 |
Frequently Asked Questions
What is AS21574?
AS21574 is an Autonomous System Number assigned to Century Telecom Ltda. 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 AS21574 announce?
AS21574 announces 13.3K IPv4 addresses distributed across 4 routed CIDR prefixes. The network is registered in Brazil.
Who operates AS21574?
AS21574 is operated by Century Telecom Ltda. The organization is based in Brazil. You can view all IP ranges and related ASNs on the organization page.
What country is AS21574 registered in?
AS21574 is registered in Brazil. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
