ASN AS39790 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS39790?

AS39790 is listed under Web4U s.r.o..

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS39790 Web4U s.r.o. | IPGeolocation.io

Web4U s.r.o. web4u.cz

CZ 8 Routes

AS Data

AS39790

AS39790 – Web4U s.r.o.

AS Number	39790
AS Name	WEB4U
Organization	Web4U s.r.o. (org-ws296-ripe)
Country	CZ
Website	web4u.cz
Number of IPv4 Routes	5
Number of IPv6 Routes	3
ASN type	BUSINESS
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2006-04-25

ASN Intelligence API for production workflows

Use ASN data for AS39790 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

IP Ranges

Route	Origin	Origin Name	ISP	# IPs
81.91.80.0/21	AS39790	Web4U s.r.o.	Web4U s.r.o.	2048
81.91.88.0/21	AS39790	Web4U s.r.o.	WEB4U network	2048
185.14.224.0/23	AS39790	Web4U s.r.o.	WEB4U customers	512
2001:1568::/32	AS39790	Web4U s.r.o.	WEB4U network	~79×10²⁷
2001:1568::/33	AS39790	Web4U s.r.o.	WEB4U network	~40×10²⁷
2001:1568:8000::/33	AS39790	Web4U s.r.o.	Web4U s.r.o.	~40×10²⁷
185.14.224.0/22	AS39790	Web4U s.r.o.	WEB4U customers	1024
81.91.80.0/20	AS39790	Web4U s.r.o.	Web4U s.r.o.	4096

Raw Whois Response

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to 'AS39601 - AS39935'

as-block:       AS39601 - AS39935
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2023-08-29T07:47:54Z
last-modified:  2023-08-29T07:47:54Z
source:         RIPE

% Information related to 'AS39790'

% Abuse contact for 'AS39790' is 'abuse@web4u.cz'

aut-num:        AS39790
as-name:        WEB4U
org:            ORG-WS296-RIPE
remarks:
remarks:        ===================================================================
remarks:        ===[ UPSTREAM CONNECTIVITY ]=======================================
remarks:        ===================================================================
remarks:
remarks:        ---[ Comsource ]---
import:         from AS199803 accept ANY
export:         to AS199803 announce AS-WEB4U
mp-import:      afi ipv6.unicast from AS199803 accept ANY
mp-export:      afi ipv6.unicast to AS199803 announce AS-WEB4U
remarks:        ---[ CRA ]---
import:         from AS25248 accept ANY
export:         to AS25248 announce AS-WEB4U
mp-import:      afi ipv6.unicast from AS25248 accept ANY
mp-export:      afi ipv6.unicast to AS25248 announce AS-WEB4U
remarks:
remarks:        ===================================================================
remarks:        ===[ NIX.CZ IPV4 PEERINGS ]========================================
remarks:        ===================================================================
remarks:
import:         from AS112 accept ANY
import:         from AS13150 accept ANY
import:         from AS13335 accept ANY
import:         from AS15169 accept ANY
import:         from AS15685 accept ANY
import:         from AS15935 accept ANY
import:         from AS16276 accept ANY
import:         from AS16509 accept ANY
import:         from AS20723 accept ANY
import:         from AS21430 accept ANY
import:         from AS24806 accept ANY
import:         from AS24971 accept ANY
import:         from AS25192 accept ANY
import:         from AS25234 accept ANY
import:         from AS25248 accept ANY
import:         from AS25424 accept ANY
import:         from AS25512 accept ANY
import:         from AS2852 accept ANY
import:         from AS29086 accept ANY
import:         from AS29134 accept ANY
import:         from AS29208 accept ANY
import:         from AS34080 accept ANY
import:         from AS35236 accept ANY
import:         from AS35592 accept ANY
import:         from AS38949 accept ANY
import:         from AS39791 accept ANY
import:         from AS41711 accept ANY
import:         from AS42000 accept ANY
import:         from AS43037 accept ANY
import:         from AS43413 accept ANY
import:         from AS43541 accept ANY
import:         from AS47232 accept ANY
import:         from AS47868 accept ANY
import:         from AS49544 accept ANY
import:         from AS61296 accept ANY
import:         from AS6855 accept ANY
import:         from AS6881 accept ANY
import:         from AS6939 accept ANY
import:         from AS8075 accept ANY
import:         from AS8251 accept ANY
import:         from AS8913 accept ANY
export:         to AS112 announce AS-WEB4U
export:         to AS13150 announce AS-WEB4U
export:         to AS13335 announce AS-WEB4U
export:         to AS15169 announce AS-WEB4U
export:         to AS15685 announce AS-WEB4U
export:         to AS15935 announce AS-WEB4U
export:         to AS16276 announce AS-WEB4U
export:         to AS16509 announce AS-WEB4U
export:         to AS20723 announce AS-WEB4U
export:         to AS21430 announce AS-WEB4U
export:         to AS24806 announce AS-WEB4U
export:         to AS24971 announce AS-WEB4U
export:         to AS25192 announce AS-WEB4U
export:         to AS25234 announce AS-WEB4U
export:         to AS25248 announce AS-WEB4U
export:         to AS25424 announce AS-WEB4U
export:         to AS25512 announce AS-WEB4U
export:         to AS2852 announce AS-WEB4U
export:         to AS29086 announce AS-WEB4U
export:         to AS29134 announce AS-WEB4U
export:         to AS29208 announce AS-WEB4U
export:         to AS34080 announce AS-WEB4U
export:         to AS35236 announce AS-WEB4U
export:         to AS35592 announce AS-WEB4U
export:         to AS38949 announce AS-WEB4U
export:         to AS39791 announce AS-WEB4U
export:         to AS41711 announce AS-WEB4U
export:         to AS42000 announce AS-WEB4U
export:         to AS43037 announce AS-WEB4U
export:         to AS43413 announce AS-WEB4U
export:         to AS43541 announce AS-WEB4U
export:         to AS47232 announce AS-WEB4U
export:         to AS47868 announce AS-WEB4U
export:         to AS49544 announce AS-WEB4U
export:         to AS61296 announce AS-WEB4U
export:         to AS6855 announce AS-WEB4U
export:         to AS6881 announce AS-WEB4U
export:         to AS6939 announce AS-WEB4U
export:         to AS8075 announce AS-WEB4U
export:         to AS8251 announce AS-WEB4U
export:         to AS8913 announce AS-WEB4U
remarks:
remarks:        ===================================================================
remarks:
admin-c:        WM3536-RIPE
tech-c:         WM3536-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-WEB4U
created:        2006-04-25T12:37:01Z
last-modified:  2026-07-22T12:11:38Z
source:         RIPE # Filtered

organisation:   ORG-WS296-RIPE
org-name:       Web4U s.r.o.
country:        CZ
reg-nr:         17311501
org-type:       LIR
address:        Mahlerovy sady 1
address:        13000
address:        Praha 3
address:        CZECH REPUBLIC
phone:          +420270001456
admin-c:        WM3536-RIPE
tech-c:         WM3536-RIPE
abuse-c:        AR68991-RIPE
mnt-ref:        MNT-WEB4U
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNT-WEB4U
created:        2022-09-20T07:29:12Z
last-modified:  2026-05-13T07:03:44Z
source:         RIPE # Filtered

role:           WEB4U network operations
address:        CZECH REPUBLIC
address:        Praha 3
address:        13000
address:        Mahlerovy sady 1
phone:          +420270001456
admin-c:        FP15631-RIPE
tech-c:         FP15631-RIPE
abuse-mailbox:  abuse@web4u.cz
nic-hdl:        WM3536-RIPE
mnt-by:         MNT-WEB4U
created:        2022-09-20T07:29:12Z
last-modified:  2022-10-17T12:21:14Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.123 (DEXTER)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS39601 - AS39935",
    "description" : [ "RIPE NCC ASN block" ],
    "remarks" : [ "These AS Numbers are assigned to network operators in the RIPE NCC service region." ],
    "mnt_by" : [ "RIPE-NCC-HM-MNT" ],
    "date_created" : "2023-08-29",
    "date_updated" : "2023-08-29",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS39790",
    "as_name" : "WEB4U",
    "status" : "ASSIGNED",
    "import" : [ "from AS199803 accept ANY", "from AS25248 accept ANY", "from AS112 accept ANY", "from AS13150 accept ANY", "from AS13335 accept ANY", "from AS15169 accept ANY", "from AS15685 accept ANY", "from AS15935 accept ANY", "from AS16276 accept ANY", "from AS16509 accept ANY", "from AS20723 accept ANY", "from AS21430 accept ANY", "from AS24806 accept ANY", "from AS24971 accept ANY", "from AS25192 accept ANY", "from AS25234 accept ANY", "from AS25248 accept ANY", "from AS25424 accept ANY", "from AS25512 accept ANY", "from AS2852 accept ANY", "from AS29086 accept ANY", "from AS29134 accept ANY", "from AS29208 accept ANY", "from AS34080 accept ANY", "from AS35236 accept ANY", "from AS35592 accept ANY", "from AS38949 accept ANY", "from AS39791 accept ANY", "from AS41711 accept ANY", "from AS42000 accept ANY", "from AS43037 accept ANY", "from AS43413 accept ANY", "from AS43541 accept ANY", "from AS47232 accept ANY", "from AS47868 accept ANY", "from AS49544 accept ANY", "from AS61296 accept ANY", "from AS6855 accept ANY", "from AS6881 accept ANY", "from AS6939 accept ANY", "from AS8075 accept ANY", "from AS8251 accept ANY", "from AS8913 accept ANY" ],
    "mp_import" : [ "afi ipv6.unicast from AS199803 accept ANY", "afi ipv6.unicast from AS25248 accept ANY" ],
    "export" : [ "to AS199803 announce AS-WEB4U", "to AS25248 announce AS-WEB4U", "to AS112 announce AS-WEB4U", "to AS13150 announce AS-WEB4U", "to AS13335 announce AS-WEB4U", "to AS15169 announce AS-WEB4U", "to AS15685 announce AS-WEB4U", "to AS15935 announce AS-WEB4U", "to AS16276 announce AS-WEB4U", "to AS16509 announce AS-WEB4U", "to AS20723 announce AS-WEB4U", "to AS21430 announce AS-WEB4U", "to AS24806 announce AS-WEB4U", "to AS24971 announce AS-WEB4U", "to AS25192 announce AS-WEB4U", "to AS25234 announce AS-WEB4U", "to AS25248 announce AS-WEB4U", "to AS25424 announce AS-WEB4U", "to AS25512 announce AS-WEB4U", "to AS2852 announce AS-WEB4U", "to AS29086 announce AS-WEB4U", "to AS29134 announce AS-WEB4U", "to AS29208 announce AS-WEB4U", "to AS34080 announce AS-WEB4U", "to AS35236 announce AS-WEB4U", "to AS35592 announce AS-WEB4U", "to AS38949 announce AS-WEB4U", "to AS39791 announce AS-WEB4U", "to AS41711 announce AS-WEB4U", "to AS42000 announce AS-WEB4U", "to AS43037 announce AS-WEB4U", "to AS43413 announce AS-WEB4U", "to AS43541 announce AS-WEB4U", "to AS47232 announce AS-WEB4U", "to AS47868 announce AS-WEB4U", "to AS49544 announce AS-WEB4U", "to AS61296 announce AS-WEB4U", "to AS6855 announce AS-WEB4U", "to AS6881 announce AS-WEB4U", "to AS6939 announce AS-WEB4U", "to AS8075 announce AS-WEB4U", "to AS8251 announce AS-WEB4U", "to AS8913 announce AS-WEB4U" ],
    "mp_export" : [ "afi ipv6.unicast to AS199803 announce AS-WEB4U", "afi ipv6.unicast to AS25248 announce AS-WEB4U" ],
    "organization" : "ORG-WS296-RIPE",
    "admin_contacts" : [ "WM3536-RIPE" ],
    "tech_contacts" : [ "WM3536-RIPE" ],
    "remarks" : [ "===================================================================", "===[ UPSTREAM CONNECTIVITY ]=======================================", "===================================================================", "---[ Comsource ]---", "---[ CRA ]---", "===================================================================", "===[ NIX.CZ IPV4 PEERINGS ]========================================", "===================================================================", "===================================================================" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "MNT-WEB4U" ],
    "date_created" : "2006-04-25",
    "date_updated" : "2026-07-22",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-WS296-RIPE",
    "name" : "Web4U s.r.o.",
    "type" : "LIR",
    "address" : [ "Mahlerovy sady 1", "13000", "Praha 3", "CZECH REPUBLIC" ],
    "street" : "Mahlerovy Sady",
    "city" : "3",
    "zip_code" : "13000",
    "country" : [ "CZ" ],
    "phone" : [ "+420270001456" ],
    "admin_contacts" : [ "WM3536-RIPE" ],
    "tech_contacts" : [ "WM3536-RIPE" ],
    "abuse_contacts" : [ "AR68991-RIPE" ],
    "mnt_ref" : [ "MNT-WEB4U" ],
    "mnt_by" : [ "RIPE-NCC-HM-MNT", "MNT-WEB4U" ],
    "date_created" : "2022-09-20",
    "date_updated" : "2026-05-13",
    "source" : "RIPE",
    "addressCountry" : "CZECH REPUBLIC"
  },
  "administrative_contacts" : [ {
    "handle" : "WM3536-RIPE",
    "name" : "WEB4U network operations",
    "address" : [ "CZECH REPUBLIC", "Praha 3", "13000", "Mahlerovy sady 1" ],
    "street" : "Mahlerovy Sady",
    "city" : "Praha 3",
    "zip_code" : "13000",
    "country" : "CZECH REPUBLIC",
    "abuse_mailbox" : [ "abuse@web4u.cz" ],
    "phone" : [ "+420270001456" ],
    "admin_contacts" : [ "FP15631-RIPE" ],
    "tech_contacts" : [ "FP15631-RIPE" ],
    "mnt_by" : [ "MNT-WEB4U" ],
    "date_created" : "2022-09-20",
    "date_updated" : "2022-10-17",
    "source" : "RIPE",
    "addressCountry" : "CZECH REPUBLIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "WM3536-RIPE",
    "name" : "WEB4U network operations",
    "address" : [ "CZECH REPUBLIC", "Praha 3", "13000", "Mahlerovy sady 1" ],
    "street" : "Mahlerovy Sady",
    "city" : "Praha 3",
    "zip_code" : "13000",
    "country" : "CZECH REPUBLIC",
    "abuse_mailbox" : [ "abuse@web4u.cz" ],
    "phone" : [ "+420270001456" ],
    "admin_contacts" : [ "FP15631-RIPE" ],
    "tech_contacts" : [ "FP15631-RIPE" ],
    "mnt_by" : [ "MNT-WEB4U" ],
    "date_created" : "2022-09-20",
    "date_updated" : "2022-10-17",
    "source" : "RIPE",
    "addressCountry" : "CZECH REPUBLIC"
  } ]
}

Peers

AS Number	Description	Country
AS199081	Lancom Ltd.	GR
AS25248	RADIOKOMUNIKACE a.s.	CZ
AS40994	Hohl IT e.U.	AT
AS6881	NIX.CZ z.s.p.o.	CZ
AS34080	MIRAMO spol. s.r.o.	CZ
AS6855	Slovak Telekom, a.s.	SK
AS35592	Coolhousing s.r.o.	CZ
AS6939	Hurricane Electric LLC	US
AS39791	Telco Pro Services, a. s.	CZ
AS6204	ZET.NET IP Transit	RO
AS60602	Inovare-Prim SRL	MD
AS22356	Durand do Brasil Ltda	BR
AS47200	NIX.CZ z.s.p.o.	CZ
AS198150	SIACOM JSC	GE
AS21430	WIA spol. s.r.o.	CZ
AS43413	NEW TELEKOM, spol. s r.o.	CZ
AS15685	CASABLANCA INT a.s.	CZ
AS57344	Telehouse EAD	BG
AS9498	Bharti Airtel Ltd	IN
AS29504	Freenet Liberec, z.s.	CZ
AS16509	Amazon.com, Inc.	US
AS25512	CD Telematika a.s.	CZ
AS53062	GGNET TELECOMUNICACOES LTDA	BR
AS24806	INTERNET CZ, a.s.	CZ
AS206735	Novelcomm LP	GR
AS14840	BR.Digital Telecom	BR
AS8913	Mopos Communications A.S.	CZ
AS32590	Valve Corporation	US
AS35236	UVT Internet s.r.o.	CZ
AS57463	NetIX Communications JSC	BG
AS12735	TurkNet Iletisim Hizmetleri A.S.	TR
AS15694	Atman Sp. z o.o.	PL
AS15935	ha vel internet s.r.o.	CZ
AS55818	MC-IX Matrix Internet Exchange RS-1	ID
AS8801	Rocket Fibre Ltd	GB
AS8075	Microsoft Corporation	US
AS47200	NIXCZ_RS	CZ
AS43037	Seznam.cz, a.s.	CZ
AS42000	Futruy s.r.o.	CZ
AS13150	CATO NETWORKS LTD	IL
AS6204	INTERKVM HOST SRL	RO
AS212483	LEVEL EIGHTY SIX COMMUNICATIONS LTD	GB
AS2852	CESNET z.s.p.o.	CZ
AS20723	AVONET, s.r.o.	CZ
AS41711	FreeTel, s.r.o.	CZ
AS43541	VSHosting s.r.o.	CZ
AS24482	SG.GS	SG
AS199803	ComSource s.r.o.	CZ
AS12741	Netia SA	PL
AS24971	MasterDC s.r.o.	CZ
AS1764	Next Layer Telekommunikationsdienstleistungs und Beratungs GmbH	AT
AS51184	Fonira Telekom GmbH	AT
AS6663	Euroweb Romania S.R.L.	RO
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD	GB
AS61296	TechCom s.r.o.	CZ
AS36236	NetActuate, Inc	US
AS25234	ACTIVE 24, s.r.o.	CZ
AS4455	IX Reach Ltd	GB
AS16276	OVH SAS	FR
AS8218	operated Upstreamnet gmbh	FR

Upstreams

AS Number	Description	Country
AS25248	RADIOKOMUNIKACE a.s.	CZ
AS199803	ComSource s.r.o.	CZ
AS14840	BR.Digital Telecom	BR
AS1764	Next Layer Telekommunikationsdienstleistungs und Beratungs GmbH	AT
AS263444	Open X Tecnologia Ltda	BR
AS8218	operated Upstreamnet gmbh	FR
AS4455	IX Reach Ltd	GB
AS6204	ZET.NET IP Transit	RO
AS6939	Hurricane Electric LLC	US
AS22356	Durand do Brasil Ltda	BR
AS6663	Euroweb Romania S.R.L.	RO
AS47200	NIX.CZ z.s.p.o.	CZ

ASN Lookup Tool

ASN Summary