IP address

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--23.137.4.21

Shodan(more info)

Passive DNS

IP blacklists

UCEPROTECT L1

23.137.4.21 is listed on the UCEPROTECT L1 blacklist.

Description: UCEPROTECT-NETWORK list of spam IPs.
Type of feed: primary (feed detail page)

Last checked at: 2026-04-05 15:45:01.190000
Was present on blacklist at: 2026-03-30 15:45, 2026-03-30 23:45, 2026-03-31 07:45, 2026-03-31 15:45, 2026-03-31 23:45, 2026-04-01 07:45, 2026-04-01 15:45, 2026-04-01 23:45, 2026-04-02 07:45, 2026-04-02 15:45, 2026-04-02 23:45, 2026-04-03 07:45, 2026-04-03 15:45, 2026-04-03 23:45, 2026-04-04 07:45, 2026-04-04 15:45, 2026-04-04 23:45, 2026-04-05 07:45, 2026-04-05 15:45

FireHOL anonymizers

23.137.4.21 is listed on the FireHOL anonymizers blacklist.

Description: List of anonymizing IPs, aggregated from multiple lists by FireHOL.
Type of feed: secondary (feed detail page)

Last checked at: 2026-04-05 18:05:11
Was present on blacklist at: 2026-03-30 18:05, 2026-03-31 18:05, 2026-04-01 18:05, 2026-04-02 18:05, 2026-04-03 18:05, 2026-04-04 18:05, 2026-04-05 18:05

Threat categories

TL	Role	Category	Details
42	src	—

---

Origin AS

AS63023 - AS-GLOBALTELEHOST

BGP Prefix

23.137.4.0/24

geo

Germany, Frankfurt am Main

🕑 Europe/Berlin

hostname

(null)

Address block ('inetnum' or 'NetRange' in whois database)

23.137.4.0 - 23.137.4.255

reserved_range

0

Shodan's InternetDB

Open ports: 22

Tags: –

CPEs: cpe:/o:canonical:ubuntu_linux, cpe:/a:openbsd:openssh:8.2p1

ts_added

2026-03-30 16:19:08.901000

ts_last_update

2026-04-05 16:23:00.829000

Warden event timeline

DShield event timeline

Presence on blacklists