Country
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ASN LANDING PAGE
AS21309
CASAWEB-AS HERABIT S.p.A.
Last updated · Jul 20, 2026
Total prefixes
58
IPv4 prefixes
57
IPv6 prefixes
1
ASN summary
How to read the scale of AS21309
CASAWEB-AS HERABIT S.p.A. currently reports 58 prefixes and 50 upstream, downstream, or peer relationships. These counts describe the current dataset; they do not by themselves prove network quality, reach, or service use.
What can an ASN page answer?
An ASN page shows the public organization label, country or region, BGP prefixes, and available peer and upstream relationships. It adds network context but cannot confirm a website host, physical facility, security status, or service quality.
How should you read the organization and region fields?
CASAWEB-AS HERABIT S.p.A. is currently associated with an unknown region. These values come from public network sources and are useful lookup clues; an organization label, registration region, and actual service location may differ.
How should you verify the AS21309 result?
The page shows ASN data returned by the current upstream query; interpret it with the update time. Open representative IP pages from the same network and compare prefixes, source labels, and query times. Verify operator or service claims with the relevant registry or network operator.
How to verify this ASN result
AS21309 ASN lookupAS21309 BGPAS21309 peersAS21309 prefixesAS21309 upstreamsCASAWEB-AS HERABIT S.p.A. ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
Peers
AS9002
AS9002
—
AS174
AS174
—
AS6762
AS6762
—
AS6939
AS6939
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AS13030
AS13030
—
AS8218
AS8218
—
AS5405
AS5405
—
AS14840
AS14840
—
AS137409
AS137409
—
AS8220
AS8220
—
AS20811
AS20811
—
AS59919
AS59919
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AS4455
AS4455
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AS24482
AS24482
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AS22356
AS22356
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AS24961
AS24961
—
AS198150
AS198150
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AS212483
AS212483
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AS12637
AS12637
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AS12779
AS12779
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AS13237
AS13237
—
AS15605
AS15605
—
AS49544
AS49544
—
AS49605
AS49605
—
AS2593
AS2593
—
AS5392
AS5392
—
AS5394
AS5394
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AS6204
AS6204
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AS8660
AS8660
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AS50877
AS50877
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AS51185
AS51185
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AS57111
AS57111
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AS60171
AS60171
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AS49709
AS49709
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AS202032
AS202032
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AS9009
AS9009
—
AS31543
AS31543
—
AS9498
AS9498
—
AS28716
AS28716
—
AS211102
AS211102
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 185.123.8.0/22 | AS21309 | — |
| 185.182.196.0/23 | AS21309 | — |
| 185.182.198.0/23 | AS21309 | — |
| 185.239.96.0/22 | AS21309 | — |
| 188.125.100.0/22 | AS21309 | — |
| 188.125.104.0/22 | AS21309 | — |
| 188.125.108.0/22 | AS21309 | — |
| 188.125.112.0/22 | AS21309 | — |
| 188.125.116.0/22 | AS21309 | — |
| 188.125.120.0/22 | AS21309 | — |
| 188.125.122.0/24 | AS21309 | — |
| 188.125.124.0/22 | AS21309 | — |
| 188.125.96.0/22 | AS21309 | — |
| 213.174.160.0/19 | AS21309 | — |
| 213.174.160.0/20 | AS21309 | — |
| 213.174.160.0/21 | AS21309 | — |
| 213.174.168.0/21 | AS21309 | — |
| 213.174.176.0/20 | AS21309 | — |
| 213.174.176.0/21 | AS21309 | — |
| 213.174.184.0/21 | AS21309 | — |
| 213.209.192.0/18 | AS21309 | — |
| 213.209.192.0/19 | AS21309 | — |
| 213.209.192.0/20 | AS21309 | — |
| 213.209.208.0/20 | AS21309 | — |
| 213.209.224.0/19 | AS21309 | — |
| 213.209.224.0/20 | AS21309 | — |
| 213.209.240.0/20 | AS21309 | — |
| 2a03:c380::/32 | AS21309 | — |
| 31.216.240.0/22 | AS21309 | — |
| 31.216.244.0/22 | AS21309 | — |
| 31.216.248.0/22 | AS21309 | — |
| 31.216.252.0/22 | AS21309 | — |
| 5.63.136.0/21 | AS21309 | — |
| 77.89.0.0/18 | AS21309 | — |
| 77.89.0.0/19 | AS21309 | — |
| 77.89.0.0/20 | AS21309 | — |
| 77.89.16.0/20 | AS21309 | — |
| 77.89.32.0/19 | AS21309 | — |
| 77.89.32.0/20 | AS21309 | — |
| 77.89.48.0/20 | AS21309 | — |
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Related lookups and next steps
Frequently asked questions about this ASN page
What does AS21309 represent?
AS21309 is an autonomous system number. The current source associates it with CASAWEB-AS HERABIT S.p.A. and the region field an unknown region; those values add network context but do not prove a specific service, physical location, or quality level.
What are peers, upstreams, and prefixes useful for on the AS21309 page?
They help explain the scale, interconnection depth, and route structure of AS21309. Richer peering and upstream data often indicate broader network reach, but they should still be interpreted together with prefixes and related IP landing pages.
What should you do after reviewing AS21309?
Open a concrete IP page to check how the address maps into AS21309, then compare the prefix, source labels, and query time. Verify operator or service claims with the relevant registry or network operator.
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