8251 NFX_ZSPO, CZ
Adjacency: 11 Upstream: 1 Downstream: 10
Upstream Adjacent AS list
AS1299 TWELVE99 Arelion, fka Telia Carrier, SE
Downstream Adjacent AS list
AS12984 PILSFREE, CZ
AS201608 HOVNET-AS, CZ
AS34596 HVFREE, CZ
AS214224 CESKASITNET, CZ
AS41670 HKFREE-AS, CZ
AS51400 ASSPOJENET, CZ
AS49095 P12COM, CZ
AS198977 UNART, CZ
AS59984 KLFREE-NETWORKS, CZ
AS57707 GREENDATA, CZ
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 7383 AS8251 ORG+TRN Originate: 17408 /17.91 Transit: 23296 /17.49 NFX_ZSPO, CZ
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 20238 AS8251 NFX_ZSPO, CZ 6 2 1 5 1 16.67% Prefix AS Path Aggregation Suggestion 31.47.96.0/20 4777 2497 1299 8251 78.108.96.0/20 4777 2497 1299 8251 81.201.48.0/20 4777 2497 1299 8251 + Announce - aggregate of 81.201.48.0/21 (4777 2497 1299 8251) and 81.201.56.0/21 (4777 2497 1299 8251) 81.201.48.0/21 4777 2497 1299 8251 - Withdrawn - aggregated with 81.201.56.0/21 (4777 2497 1299 8251) 81.201.56.0/21 4777 2497 1299 8251 - Withdrawn - aggregated with 81.201.48.0/21 (4777 2497 1299 8251) 185.99.64.0/22 4777 2497 1299 8251 212.79.96.0/20 4777 2497 1299 8251
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS8251 2 More Specifics 6 Total Advertisements NFX_ZSPO, CZ
81.201.48.0/21 81.201.48.0/20
81.201.56.0/21 81.201.48.0/20
whois: 402332
IANA has recorded AS8251 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS8251\n % 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.
% Information related to 'AS8192 - AS8523'
as-block: AS8192 - AS8523
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: 2018-11-22T15:27:23Z
last-modified: 2018-11-22T15:27:23Z
source: RIPE
% Information related to 'AS8251'
% Abuse contact for 'AS8251' is 'abuse@nfx.cz'
aut-num: AS8251
as-name: NFX_ZSPO
remarks: NFX, z.s.p.o., also known as FreeTel, s.r.o.
remarks: See details on https://www.peeringdb.com/asn/8251
org: ORG-SK14-RIPE
remarks: -------------------------------------------------
remarks: Upstream providers
import: from AS8251:AS-UPSTREAMS accept ANY
export: to AS8251:AS-UPSTREAMS announce AS-NFX-UPSTREAM
remarks: -------------------------------------------------
remarks: Public peerings at NIX.CZ (Prague)
import: from AS8251:AS-NIX-PEERINGS accept ANY
export: to AS8251:AS-NIX-PEERINGS announce AS-NFX-NIX
remarks: -------------------------------------------------
remarks: Private peerings at Sitel, Prague
import: from AS15169 accept AS-GOOGLE
export: to AS15169 announce AS-NFX-NIX
import: from AS6830 accept AS-AORTA
export: to AS6830 announce AS-NFX-NIX
import: from AS42000 accept AS-KAORA
export: to AS42000 announce AS-NFX-NIX
remarks: -------------------------------------------------
remarks: NFX,z.s.p.o. connected member networks
import: from AS8251:AS-NFX-MEMBERS accept AS8251:AS-NFX-MEMBERS
export: to AS8251:AS-NFX-MEMBERS announce ANY
remarks: -------------------------------------------------
admin-c: NFX
tech-c: NFX
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: CZNFX-MNT
created: 2006-07-17T11:25:11Z
last-modified: 2021-07-09T08:09:49Z
source: RIPE # Filtered
organisation: ORG-SK14-RIPE
org-name: FreeTel, s.r.o.
country: CZ
org-type: LIR
address: Luzna 716/2
Vokovice
address: 160 00
address: PRAGUE
address: CZECH REPUBLIC
phone: +420776238360
reg-nr: 24737887
abuse-c: NFXA-RIPE
admin-c: SD3468-RIPE
admin-c: MUKI
admin-c: JS6461-RIPE
mnt-ref: RIPE-NCC-HM-MNT
mnt-ref: CZNFX-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: CZNFX-MNT
created: 2006-05-10T06:49:34Z
last-modified: 2026-04-29T05:31:25Z
source: RIPE # Filtered
role: Neutral czFree eXchange
org: ORG-SK14-RIPE
address: Luzna 716/2,
address: 160 00 Praha 6
abuse-mailbox: abuse@nfx.cz
admin-c: SD3468-RIPE
admin-c: MUKI
tech-c: SD3468-RIPE
tech-c: MUKI
nic-hdl: NFX
mnt-by: CZNFX-MNT
created: 2009-09-29T22:52:28Z
last-modified: 2022-04-22T21:33:04Z
source: RIPE # Filtered
% This query was served by the RIPE Database Query Service version 1.122 (SHETLAND)