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Autonomous System

AS21527

Daystarr Communications

Announced IPs
5,888
CIDR prefixes
8
ASN
AS21527

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.

70/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Network profile

Source: PeeringDB →
Network type Cable/DSL/ISP
Traffic level 20-50Gbps
Geographic scope Regional
Traffic ratio Heavy Inbound
Peering policy Open
IRR record ARIN::AS-DAYSTARR

Present at 2 internet exchanges: DET-iX, Grand Rapids Internet Exchange (GRR-iX)

Top CIDR ranges

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS21527 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
23.157.240.0/24 116,948 2026-09-13 01:45:02
69.41.9.0/24 112,155 2026-09-13 01:45:02
69.41.4.0/24 112,024 2026-09-13 01:45:02
69.41.10.0/24 111,974 2026-09-13 01:45:02
69.41.5.0/24 110,657 2026-09-13 01:45:02
69.41.13.0/24 110,577 2026-09-13 01:45:14
148.59.89.0/24 107,860 2026-09-13 01:45:02
69.41.8.0/24 107,498 2026-09-13 01:45:02
69.41.1.0/24 107,396 2026-09-13 01:45:02
69.41.15.0/24 107,360 2026-09-13 01:45:02
69.41.11.0/24 107,356 2026-09-13 01:45:02
69.41.12.0/24 107,345 2026-09-13 01:45:02
208.65.237.0/24 106,281 2026-09-13 01:52:03
208.65.236.0/24 106,268 2026-09-13 01:52:03
208.65.238.0/24 106,268 2026-09-13 01:52:03
69.41.3.0/24 106,241 2026-09-13 01:45:02
69.41.2.0/24 106,237 2026-09-13 01:45:02
69.41.6.0/23 106,214 2026-09-13 01:45:02
104.192.192.0/23 98,450 2026-09-13 01:45:02
69.41.0.0/24 98,408 2026-09-13 01:45:02
69.41.0.0/20 98,407 2026-09-13 01:45:02
208.65.236.0/22 98,279 2026-09-13 01:52:03
208.65.239.0/24 70,536 2026-09-13 01:52:03

Frequently Asked Questions

What is AS21527?

AS21527 is an Autonomous System Number assigned to Daystarr Communications. 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 AS21527 announce?

AS21527 announces 5.9K IPv4 addresses distributed across 8 routed CIDR prefixes. The network is registered in United States.

Who operates AS21527?

AS21527 is operated by Daystarr Communications. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.

What country is AS21527 registered in?

AS21527 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-09-13 02:24:09 UTC
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