asn.dev

Autonomous system

AS21527 DAYSTARR-NET

Residential ARIN

IPv4 addresses 5.89K 8 prefixes
IPv6 prefixes 4 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 1 recorded by PCH
Upstreams 7 4 downstream
Flagged prefixes 0 none

Summary

Daystarr Communications

United States of America · AI-generated

cable dsl isp residential

DAYSTARR-NET is operated by Daystarr Communications.

What it's used for

  • The address space carries residential broadband traffic, evidenced by reverse DNS entries such as dyn3-255.clx.michonline.net, shiawassee-mi-us-cgnat-5-254.customer.daystarr.net, and sigperry.customer.michonline.net.
  • The AS announces 5888 IPv4 addresses across 8 prefixes and 4 IPv6 prefixes, with 11 observed neighbours, indicating a regional access network rather than a transit provider.

Notable

  • Most registrants are listed as Daystarr Communications, though one prefix (69.41.15.0/24) is registered to Memorial Healthcare under the netname MOG-69-41-15-0.
  • The inventory includes a CGNAT range (23.157.240.0/24) and legacy blocks from the michonline.net era, reflecting the company's history as a Michigan-based cable and DSL provider.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
Detroit Internet ExchangeDetroit, United States209.124.52.25

Transit providers

7 upstream, 4 downstream and 14 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS26554US Signal Company, L.L.C.986
AS174Cogent Communications, LLC244
AS12129123.Net, Inc.132
AS46208Peninsula Fiber Network, LLC110
AS6939Hurricane Electric LLC70
AS20205Amplex Electric, Inc.23
AS30517Great Lakes Comnet, Inc.4

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 8 prefixes · 5.89K addresses IPv6 4 prefixes

CountryNamePrefixes
USUnited States of America12

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS21527
Registry name
DAYSTARR-NET
Registrant
Daystarr Communications
Abuse contact
noc@daystarrfiber.net
Registered
2001-05-16
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 25 valid, 0 with no ROA
ROAs
6 authorising AS21527
ASPA
no ASPA record
IRR
100% registered · 25 of 25 announcements
Route objects
28 naming AS21527

Reputation

Classification and threat

Residential Fixed-line consumer ISP. Addresses here are homes.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check