AS51791
Crestu Teknoloji Dijital Hizmetler Limited Sirketi
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 →AS51791 — global IP footprint
Cities where AS51791 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 |
|---|---|---|---|---|---|---|
| 153.56.128.0/23 | 512 |
0.0%
|
Crestu Teknoloji Dijital Hizmetler Limited Sirketi | TR | Bursa Province | Bursa |
| 153.56.130.0/24 | 256 |
98.8%
|
Crestu Teknoloji Dijital Hizmetler Limited Sirketi | TR | Bursa Province | Bursa |
| 185.184.24.0/24 | 256 |
18.0%
|
Crestu Teknoloji Dijital Hizmetler Limited Sirketi | TR | — | — |
| 193.17.5.0/24 | 256 |
98.8%
|
Crestu Teknoloji Dijital Hizmetler Limited Sirketi | TR | — | — |
| 193.17.7.0/24 | 256 |
30.9%
|
Crestu Teknoloji Dijital Hizmetler Limited Sirketi | TR | — | — |
| 193.160.141.0/24 | 256 |
98.0%
|
Crestu Teknoloji Dijital Hizmetler Limited Sirketi | TR | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS51791 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 |
|---|---|---|
| 153.56.128.0/24 | 214,586 | 2026-07-24 00:05:44 |
| 153.56.130.0/24 | 211,333 | 2026-07-24 00:05:44 |
| 153.56.129.0/24 | 209,093 | 2026-07-24 00:05:44 |
| 193.17.7.0/24 | 4,571 | 2026-06-24 17:22:21 |
Frequently Asked Questions
What is AS51791?
AS51791 is an Autonomous System Number assigned to Crestu Teknoloji Dijital Hizmetler Limited Sirketi. 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 AS51791 announce?
AS51791 announces 1.8K IPv4 addresses distributed across 6 routed CIDR prefixes. The network is registered in Türkiye.
Who operates AS51791?
AS51791 is operated by Crestu Teknoloji Dijital Hizmetler Limited Sirketi. The organization is based in Türkiye. You can view all IP ranges and related ASNs on the organization page.
What country is AS51791 registered in?
AS51791 is registered in Türkiye. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
