ASN AS1921 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS1921?

AS1921 is listed under ipcom GmbH.

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?

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AS1921 ipcom GmbH | IPGeolocation.io

ipcom GmbH cert.at

AT 20 Routes

AS Data

AS1921

AS1921 – ipcom GmbH

AS Number	1921
AS Name	RCODEZERO-ANYCAST-SEC1-TLD
Organization	ipcom GmbH(org-igfi3-ripe)
Country	AT
Website	cert.at
Number of IPv4 Routes	10
Number of IPv6 Routes	10
ASN type	ISP
Allocation Status	LEGACY
Registry	RIPE
Date Allocated	2002-08-21

ASN Intelligence API for production workflows

Use ASN data for AS1921 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2a02:850:ffe5::/48	AS1921	ipcom GmbH	nic.at GmbH	~1×10²⁴
185.80.188.0/24	AS1921	ipcom GmbH	ipcom GmbH	256
2a02:850:ffe0::/48	AS1921	ipcom GmbH	nic.at GmbH	~1×10²⁴
194.0.25.0/24	AS1921	ipcom GmbH	nic.at GmbH	256
2a02:850:ffff::/48	AS1921	ipcom GmbH	nic.at and RcodeZero LINX	~1×10²⁴
2a02:850:ffe6::/48	AS1921	ipcom GmbH	nic.at GmbH	~1×10²⁴
185.102.12.0/24	AS1921	ipcom GmbH	ipcom GmbH	256
194.0.182.0/24	AS1921	ipcom GmbH	1api GmbH	256
91.237.67.0/24	AS1921	ipcom GmbH	Name SRS AB	256
193.46.133.0/24	AS1921	ipcom GmbH	nic.at GmbH	256

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 'AS1921 - AS1923'

as-block:       AS1921 - AS1923
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:        2018-11-22T15:27:14Z
last-modified:  2018-11-22T15:27:14Z
source:         RIPE

% Information related to 'AS1921'

% Abuse contact for 'AS1921' is 'reports@cert.at'

aut-num:        AS1921
as-name:        RCODEZERO-ANYCAST-SEC1-TLD
descr:          RcodeZero Anycast DNS
org:            ORG-IGFI3-RIPE
sponsoring-org: ORG-nIBu1-RIPE
remarks:        =================================================
remarks:        Transit: nic.at GmbH
import:         from AS30971 accept ANY
export:         to AS30971 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS30971 accept ANY
mp-export:      afi ipv6.unicast to AS30971 announce AS-RCODEZERO
remarks:
remarks:        Transit: Cloud2 - LAX/FMT/HE
import:         from AS207021 accept ANY
export:         to AS207021 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS207021 accept ANY
mp-export:      afi ipv6.unicast to AS207021 announce AS-RCODEZERO
remarks:
remarks:        Transit: IEDR
import:         from AS42310 accept ANY
export:         to AS42310 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS42310 accept ANY
mp-export:      afi ipv6.unicast to AS42310 announce AS-RCODEZERO
remarks:
remarks:        Transit: NASK
import:         from AS8308 accept ANY
export:         to AS8308 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS8308 accept ANY
mp-export:      afi ipv6.unicast to AS8308 announce AS-RCODEZERO
remarks:
remarks:        Transit: 365 Data Centers (Atlantic Metro AS)
import:         from AS29838 accept ANY
export:         to AS29838 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS29838 accept ANY
mp-export:      afi ipv6.unicast to AS29838 announce AS-RCODEZERO
remarks:
remarks:        Transit: 365 Data Centers (Inforelay AS)
import:         from AS33597 accept ANY
export:         to AS33597 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS33597 accept ANY
mp-export:      afi ipv6.unicast to AS33597 announce AS-RCODEZERO
remarks:
remarks:        Transit: 365 Data Centers (BroadbandONE)
import:         from AS19151 accept ANY
export:         to AS19151 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS19151 accept ANY
mp-export:      afi ipv6.unicast to AS19151 announce AS-RCODEZERO
remarks:
remarks:        Transit: i3D
import:         from AS49544 accept ANY
export:         to AS49544 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS49544 accept ANY
mp-export:      afi ipv6.unicast to AS49544 announce AS-RCODEZERO
remarks:
remarks:        Transit: ANEXIA
import:         from AS42473 accept ANY
export:         to AS42473 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS42473 accept ANY
mp-export:      afi ipv6.unicast to AS42473 announce AS-RCODEZERO
remarks:
remarks:        Transit: Portlane
import:         from AS42708 accept ANY
export:         to AS42708 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS42708 accept ANY
mp-export:      afi ipv6.unicast to AS42708 announce AS-RCODEZERO
remarks:
remarks:        Transit: Vultr/Choopa
import:         from AS20473 accept ANY
export:         to AS20473 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS20473 accept ANY
mp-export:      afi ipv6.unicast to AS20473 announce AS-RCODEZERO
remarks:
remarks:        Transit: nic.br
import:         from AS22548 accept ANY
export:         to AS22548 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS22548 accept ANY
mp-export:      afi ipv6.unicast to AS22548 announce AS-RCODEZERO
remarks:
remarks:        Transit: DigitalPacific
import:         from AS55803 accept ANY
export:         to AS55803 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS55803 accept ANY
mp-export:      afi ipv6.unicast to AS55803 announce AS-RCODEZERO
remarks:
remarks:        Transit: HostVirtual
import:         from AS36236 accept ANY
export:         to AS36236 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS36236 accept ANY
mp-export:      afi ipv6.unicast to AS36236 announce AS-RCODEZERO
remarks:
remarks:        Transit: Infomaniak
import:         from AS29222 accept ANY
export:         to AS29222 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS29222 accept ANY
mp-export:      afi ipv6.unicast to AS29222 announce AS-RCODEZERO
remarks:
remarks:        Transit: LINX-AS
import:         from AS5459 accept ANY
export:         to AS5459 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS5459 accept ANY
mp-export:      afi ipv6.unicast to AS5459 announce AS-RCODEZERO
remarks:
remarks:        Transit: HE IPv6 only
mp-import:      afi ipv6.unicast from AS6939 accept ANY
mp-export:      afi ipv6.unicast to AS6939 announce AS-RCODEZERO
remarks:
remarks:        Transit: First Colo
import:         from AS44066 accept ANY
export:         to AS44066 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS44066 accept ANY
mp-export:      afi ipv6.unicast to AS44066 announce AS-RCODEZERO
remarks:
remarks:        Transit: G-Core Labs S.A.
import:         from AS199524 accept ANY
export:         to AS199524 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS199524 accept ANY
mp-export:      afi ipv6.unicast to AS199524 announce AS-RCODEZERO
remarks:
remarks:        Transit: Cloudflare
export:         to AS13335 announce AS-RCODEZERO
mp-export:      afi ipv6.unicast to AS13335 announce AS-RCODEZERO
remarks:
remarks:        Transit: Edgeuno
import:         from AS7195 accept ANY
export:         to AS7195 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS7195 accept ANY
mp-export:      afi ipv6.unicast to AS7195 announce AS-RCODEZERO
remarks:
remarks:        Transit: nic.hu
import:         from AS12303 accept ANY
export:         to AS12303 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS12303 accept ANY
mp-export:      afi ipv6.unicast to AS12303 announce AS-RCODEZERO
remarks:
remarks:        Transit: ScaleUp Technologies
import:         from AS29014 accept ANY
export:         to AS29014 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS29014 accept ANY
mp-export:      afi ipv6.unicast to AS29014 announce AS-RCODEZERO
remarks:
remarks:        Routeserver: Rheintal IX
import:         from AS58171 accept AS-RIX-RS
export:         to AS58171 announce AS-RCODEZERO
mp-import:      afi ipv6.unicast from AS58171 accept AS-RIX-RS
mp-export:      afi ipv6.unicast to AS58171 announce AS-RCODEZERO
remarks:
remarks:        =================================================
remarks:        Customer: ACOnet/Univie (Dallas)
import:         from AS35052 accept AS35052
export:         to AS35052 announce ANY
mp-import:      afi ipv6.unicast from AS35052 accept AS35052
mp-export:      afi ipv6.unicast to AS35052 announce ANY
remarks:
remarks:        Customer: ACOnet/Univie (London)
import:         from AS49488 accept AS49488
export:         to AS49488 announce ANY
mp-import:      afi ipv6.unicast from AS35052 accept AS35052
mp-export:      afi ipv6.unicast to AS35052 announce ANY
remarks:
remarks:        Customer: b.dns.br (Singapore)
import:         from AS10906 accept AS10906
export:         to AS10906 announce ANY
mp-import:      afi ipv6.unicast from AS10906 accept AS10906
mp-export:      afi ipv6.unicast to AS10906 announce ANY
remarks:
remarks:        Customer: d.dns.br (Singapore)
import:         from AS11644 accept AS11644
export:         to AS11644 announce ANY
mp-import:      afi ipv6.unicast from AS11644 accept AS11644
mp-export:      afi ipv6.unicast to AS11644 announce ANY
remarks:        =================================================
mnt-by:         RIPE-NCC-LEGACY-MNT
mnt-by:         NICAT-MNT
admin-c:        RS3195-RIPE
admin-c:        KD36
tech-c:         Nto1-RIPE
status:         LEGACY
created:        2002-08-21T16:07:49Z
last-modified:  2025-11-20T14:18:26Z
source:         RIPE

organisation:   ORG-IGfi3-RIPE
org-name:       ipcom GmbH
country:        AT
org-type:       OTHER
address:        Karlsplatz 1/2/9, 1010 Wien, Austria
mnt-ref:        NICAT-MNT
mnt-by:         NICAT-MNT
admin-c:        Nto1-RIPE
abuse-c:        Nto1-RIPE
created:        2012-09-10T10:29:23Z
last-modified:  2022-12-01T16:30:22Z
source:         RIPE # Filtered

role:           NIC.at Operations Object
address:        Jakob-Haringerstrasse 8
address:        A-5020 Salzburg
address:        Austria
phone:          +43 662 4669 0
fax-no:         +43 662 4669 19
admin-c:        KD36
admin-c:        RS3195-RIPE
tech-c:         MB125
tech-c:         MHO44-RIPE
tech-c:         HAD45-RIPE
tech-c:         KD36
tech-c:         TS40375-RIPE
tech-c:         FR9272-RIPE
nic-hdl:        Nto1-RIPE
mnt-by:         NICAT-MNT
created:        2010-02-17T17:07:26Z
last-modified:  2025-11-20T14:06:30Z
source:         RIPE # Filtered
abuse-mailbox:  reports@cert.at

person:         Klaus Darilion
address:        nic.at
address:        Karlsplatz 1/2/9
address:        A-1010 Vienna
phone:          +43 662 4669 36
nic-hdl:        KD36
mnt-by:         NICAT-MNT
created:        2011-04-27T15:03:51Z
last-modified:  2017-10-30T22:13:36Z
source:         RIPE # Filtered

person:         Robert Schischka
address:        NIC.AT
address:        Jakob-Haringerstr. 8
address:        A-5020 Salzburg
address:        AUSTRIA
phone:          +43-662-4669 15
nic-hdl:        RS3195-RIPE
mnt-by:         AT-DOM-MNT
created:        2003-09-29T16:27:37Z
last-modified:  2003-10-03T08:08:40Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.121.2 (SHETLAND)



#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       1921 - 1923
ASName:         RIPE-ASNBLOCK-1921
ASHandle:       AS1921
RegDate:        2002-10-15
Updated:        2003-04-25
Comment:        These addresses have been further assigned to users in
Comment:        the RIPE NCC region. Contact information can be found in
Comment:        the RIPE database at http://www.ripe.net/whois    
Ref:            https://rdap.arin.net/registry/autnum/1921

ResourceLink:  https://apps.db.ripe.net/db-web-ui/query
ResourceLink:  whois.ripe.net


OrgName:        RIPE Network Coordination Centre
OrgId:          RIPE
Address:        P.O. Box 10096
City:           Amsterdam
StateProv:      
PostalCode:     1001EB
Country:        NL
RegDate:        
Updated:        2013-07-29
Ref:            https://rdap.arin.net/registry/entity/RIPE

ReferralServer:  whois.ripe.net
ResourceLink:  https://apps.db.ripe.net/db-web-ui/query

OrgAbuseHandle: ABUSE3850-ARIN
OrgAbuseName:   Abuse Contact
OrgAbusePhone:  +31205354444 
OrgAbuseEmail:  abuse@ripe.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE3850-ARIN

OrgTechHandle: RNO29-ARIN
OrgTechName:   RIPE NCC Operations
OrgTechPhone:  +31 20 535 4444 
OrgTechEmail:  hostmaster@ripe.net
OrgTechRef:    https://rdap.arin.net/registry/entity/RNO29-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "1921 - 1923",
    "as_handle" : "AS1921",
    "as_name" : "RIPE-ASNBLOCK-1921",
    "tech_contacts" : [ "RNO29-ARIN" ],
    "abuse_contacts" : [ "ABUSE3850-ARIN" ],
    "date_created" : "2002-10-15",
    "date_updated" : "2003-04-25",
    "source" : "https://rdap.arin.net/registry/autnum/1921"
  } ],
  "organization" : {
    "handle" : "RIPE",
    "name" : "RIPE Network Coordination Centre",
    "address" : [ "P.O. Box 10096", "Amsterdam", "1001EB", "NL" ],
    "city" : "Amsterdam",
    "zip_code" : "1001EB",
    "country" : [ "NL" ],
    "date_updated" : "2013-07-29",
    "source" : "https://rdap.arin.net/registry/entity/RIPE",
    "addressCountry" : "NL"
  },
  "technical_contacts" : [ {
    "handle" : "RNO29-ARIN",
    "name" : "RIPE NCC Operations",
    "email" : [ "hostmaster@ripe.net" ],
    "phone" : [ "+31 20 535 4444" ],
    "source" : "https://rdap.arin.net/registry/entity/RNO29-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "ABUSE3850-ARIN",
    "name" : "Abuse Contact",
    "email" : [ "abuse@ripe.net" ],
    "phone" : [ "+31205354444" ],
    "source" : "https://rdap.arin.net/registry/entity/ABUSE3850-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS12552	GlobalConnect AB	SE
AS28792	Public Internet Ltd	GB
AS58057	Securebit AG	CH
AS20932	Service Telecom	CH
AS35266	EX Networks Limited	GB
AS60602	Inovare-Prim SRL	MD
AS38880	Micron21 Datacentre Pty Ltd	AU
AS198150	SIACOM JSC	GE
AS45352	IP ServerOne Solutions Sdn Bhd	MY
AS40850	UPIX NETWORKS INTERNATIONAL LLC	US

Upstreams

AS Number	Description	Country
AS12552	GlobalConnect AB	SE
AS7195	EDGEUNO S.A.S	CO
AS39351	31173 Services AB	SE
AS6939	Hurricane Electric LLC	US
AS6204	ZET.NET IP Transit	RO
AS37468	Angola Cables	AO
AS20764	CJSC RASCOM	RU
AS30971	nic.at GmbH	AT
AS15802	Emirates Integrated Telecommunications Company PJSC	AE
AS37497	Network Platforms PTY LTD	ZA

Downstreams

AS Number	Description	Country
AS12136	N�cleo de Inf. e Coord. do Ponto BR NIC.BR	BR
AS35052	ACONET	AT
AS11644	N�cleo de Inf. e Coord. do Ponto BR NIC.BR	BR

Contacts

Email Contacts

reports@cert.at

Abuse Contacts

reports@cert.at

Legacy Routes

194.50.187.0/24 2001:67c:10b8::/48 176.97.158.0/24 2a0b:8e00:1::/48 193.46.135.0/24 2a02:850:ffe7::/48 185.167.176.0/24 2a04:2b00:14dd::/48

ASN Lookup Tool

ASN Summary