12257 EMC-AS12257, US
Adjacency: 13 Upstream: 13 Downstream: 0
Upstream Adjacent AS list
AS3356 LEVEL3, US
AS701 UUNET, US
AS5400 BT, GB
AS8220 COLT COLT Technology Services Group Limited, GB
AS9498 BBIL-AP BHARTI Airtel Ltd., IN
AS7018 ATT-INTERNET4, US
AS1273 CW Vodafone Group PLC, EU
AS12849 HOTNET-IL HOTmobile, IL
AS198949 RADWARE, IL
AS4657 STARHUB-INTERNET StarHub Ltd, SG
AS2686 ATGS-MMD-AS, US
AS12400 PARTNER-AS, IL
AS4755 TATACOMM-AS TATA Communications formerly VSNL is Leading ISP, IN
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 7811 AS12257 ORIGIN Originate: 16384 /18.00 Transit: 0 /0.00 EMC-AS12257, US
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 % 2203 AS12257 EMC-AS12257, US 64 40 14 38 26 40.62% Prefix AS Path Aggregation Suggestion 12.7.200.0/24 7018 12257 128.221.192.0/24 7018 12257 128.221.208.0/23 7018 12257 + Announce - aggregate of 128.221.208.0/24 (7018 12257) and 128.221.209.0/24 (7018 12257) 128.221.208.0/24 7018 12257 - Withdrawn - aggregated with 128.221.209.0/24 (7018 12257) 128.221.209.0/24 7018 12257 - Withdrawn - aggregated with 128.221.208.0/24 (7018 12257) 128.221.212.0/22 7018 12257 + Announce - aggregate of 128.221.212.0/23 (7018 12257) and 128.221.214.0/23 (7018 12257) 128.221.212.0/24 7018 12257 - Withdrawn - aggregated with 128.221.213.0/24 (7018 12257) 128.221.213.0/24 7018 12257 - Withdrawn - aggregated with 128.221.212.0/24 (7018 12257) 128.221.214.0/24 7018 12257 - Withdrawn - aggregated with 128.221.215.0/24 (7018 12257) 128.221.215.0/24 7018 12257 - Withdrawn - aggregated with 128.221.214.0/24 (7018 12257) 128.221.216.0/21 7018 12257 + Announce - aggregate of 128.221.216.0/22 (7018 12257) and 128.221.220.0/22 (7018 12257) 128.221.216.0/24 7018 12257 - Withdrawn - aggregated with 128.221.217.0/24 (7018 12257) 128.221.217.0/24 7018 12257 - Withdrawn - aggregated with 128.221.216.0/24 (7018 12257) 128.221.218.0/24 7018 12257 - Withdrawn - aggregated with 128.221.219.0/24 (7018 12257) 128.221.219.0/24 7018 12257 - Withdrawn - aggregated with 128.221.218.0/24 (7018 12257) 128.221.220.0/24 7018 12257 - Withdrawn - aggregated with 128.221.221.0/24 (7018 12257) 128.221.221.0/24 7018 12257 - Withdrawn - aggregated with 128.221.220.0/24 (7018 12257) 128.221.222.0/24 7018 12257 - Withdrawn - aggregated with 128.221.223.0/24 (7018 12257) 128.221.223.0/24 7018 12257 - Withdrawn - aggregated with 128.221.222.0/24 (7018 12257) 128.221.224.0/22 7018 12257 + Announce - aggregate of 128.221.224.0/23 (7018 12257) and 128.221.226.0/23 (7018 12257) 128.221.224.0/24 7018 12257 - Withdrawn - aggregated with 128.221.225.0/24 (7018 12257) 128.221.225.0/24 7018 12257 - Withdrawn - aggregated with 128.221.224.0/24 (7018 12257) 128.221.226.0/24 7018 12257 - Withdrawn - aggregated with 128.221.227.0/24 (7018 12257) 128.221.227.0/24 7018 12257 - Withdrawn - aggregated with 128.221.226.0/24 (7018 12257) 128.221.228.0/24 7018 12257 128.221.230.0/23 7018 12257 + Announce - aggregate of 128.221.230.0/24 (7018 12257) and 128.221.231.0/24 (7018 12257) 128.221.230.0/24 7018 12257 - Withdrawn - aggregated with 128.221.231.0/24 (7018 12257) 128.221.231.0/24 7018 12257 - Withdrawn - aggregated with 128.221.230.0/24 (7018 12257) 128.221.232.0/23 7018 12257 + Announce - aggregate of 128.221.232.0/24 (7018 12257) and 128.221.233.0/24 (7018 12257) 128.221.232.0/24 7018 12257 - Withdrawn - aggregated with 128.221.233.0/24 (7018 12257) 128.221.233.0/24 7018 12257 - Withdrawn - aggregated with 128.221.232.0/24 (7018 12257) 128.221.235.0/24 7018 12257 128.221.237.0/24 7018 12257 128.221.239.0/24 7018 12257 132.237.141.0/24 7018 12257 137.69.113.0/24 7018 12257 137.69.117.0/24 7018 12257 147.178.2.0/24 7018 12257 147.178.4.0/23 7018 12257 + Announce - aggregate of 147.178.4.0/24 (7018 12257) and 147.178.5.0/24 (7018 12257) 147.178.4.0/24 7018 12257 - Withdrawn - aggregated with 147.178.5.0/24 (7018 12257) 147.178.5.0/24 7018 12257 - Withdrawn - aggregated with 147.178.4.0/24 (7018 12257) 147.178.6.0/23 2497 1273 12257 12257 12257 12257 + Announce - aggregate of 147.178.6.0/24 (2497 1273 12257 12257 12257 12257) and 147.178.7.0/24 (2497 1273 12257 12257 12257 12257) 147.178.6.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 147.178.7.0/24 (2497 1273 12257 12257 12257 12257) 147.178.7.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 147.178.6.0/24 (2497 1273 12257 12257 12257 12257) 147.178.8.0/24 57866 6453 4755 12257 12257 12257 12257 152.62.97.0/24 3303 12400 12257 152.62.108.0/23 2497 1273 12257 12257 12257 12257 + Announce - aggregate of 152.62.108.0/24 (2497 1273 12257 12257 12257 12257) and 152.62.109.0/24 (2497 1273 12257 12257 12257 12257) 152.62.108.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.109.0/24 (2497 1273 12257 12257 12257 12257) 152.62.109.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.108.0/24 (2497 1273 12257 12257 12257 12257) 152.62.110.0/24 2497 1273 12257 12257 12257 12257 152.62.112.0/23 2497 1273 12257 12257 12257 12257 + Announce - aggregate of 152.62.112.0/24 (2497 1273 12257 12257 12257 12257) and 152.62.113.0/24 (2497 1273 12257 12257 12257 12257) 152.62.112.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.113.0/24 (2497 1273 12257 12257 12257 12257) 152.62.113.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.112.0/24 (2497 1273 12257 12257 12257 12257) 152.62.115.0/24 2497 1273 12257 12257 12257 12257 152.62.118.0/24 3303 12400 12257 152.62.154.0/23 3303 12400 12257 + Announce - aggregate of 152.62.154.0/24 (3303 12400 12257) and 152.62.155.0/24 (3303 12400 12257) 152.62.154.0/24 3303 12400 12257 - Withdrawn - aggregated with 152.62.155.0/24 (3303 12400 12257) 152.62.155.0/24 3303 12400 12257 - Withdrawn - aggregated with 152.62.154.0/24 (3303 12400 12257) 152.62.163.0/24 7018 1299 12849 12257 152.62.164.0/23 2497 1273 12257 12257 12257 12257 + Announce - aggregate of 152.62.164.0/24 (2497 1273 12257 12257 12257 12257) and 152.62.165.0/24 (2497 1273 12257 12257 12257 12257) 152.62.164.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.165.0/24 (2497 1273 12257 12257 12257 12257) 152.62.165.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.164.0/24 (2497 1273 12257 12257 12257 12257) 152.62.184.0/22 2497 1273 12257 12257 12257 12257 + Announce - aggregate of 152.62.184.0/23 (2497 1273 12257 12257 12257 12257) and 152.62.186.0/23 (2497 1273 12257 12257 12257 12257) 152.62.184.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.185.0/24 (2497 1273 12257 12257 12257 12257) 152.62.185.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.184.0/24 (2497 1273 12257 12257 12257 12257) 152.62.186.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.187.0/24 (2497 1273 12257 12257 12257 12257) 152.62.187.0/24 2497 1273 12257 12257 12257 12257 - Withdrawn - aggregated with 152.62.186.0/24 (2497 1273 12257 12257 12257 12257) 152.62.193.0/24 2497 5400 12257 163.244.40.0/24 2497 1273 12257 12257 12257 12257 163.244.72.0/24 6939 4657 12257 12257 12257 168.159.160.0/24 57866 6453 4755 12257 12257 12257 12257 168.159.162.0/24 57866 6453 4755 12257 12257 12257 12257 168.159.212.0/23 7018 12257 12257 12257 12257 12257 + Announce - aggregate of 168.159.212.0/24 (7018 12257 12257 12257 12257 12257) and 168.159.213.0/24 (7018 12257 12257 12257 12257 12257) 168.159.212.0/24 7018 12257 12257 12257 12257 12257 - Withdrawn - aggregated with 168.159.213.0/24 (7018 12257 12257 12257 12257 12257) 168.159.213.0/24 7018 12257 12257 12257 12257 12257 - Withdrawn - aggregated with 168.159.212.0/24 (7018 12257 12257 12257 12257 12257) 168.159.215.0/24 7018 12257 12257 12257 12257 12257 198.161.247.0/24 2914 198949 12257 199.245.235.0/24 7018 12257
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS12257 101 More Specifics 102 Total Advertisements EMC-AS12257, US
12.7.200.0/24 12.0.0.0/8
128.221.192.0/24 128.221.0.0/16
128.221.204.0/24 128.221.0.0/16
128.221.208.0/24 128.221.0.0/16
128.221.209.0/24 128.221.0.0/16
128.221.210.0/24 128.221.0.0/16
128.221.211.0/24 128.221.0.0/16
128.221.212.0/24 128.221.0.0/16
128.221.213.0/24 128.221.0.0/16
128.221.214.0/24 128.221.0.0/16
128.221.215.0/24 128.221.0.0/16
128.221.216.0/24 128.221.0.0/16
128.221.217.0/24 128.221.0.0/16
128.221.218.0/24 128.221.0.0/16
128.221.219.0/24 128.221.0.0/16
128.221.220.0/24 128.221.0.0/16
128.221.221.0/24 128.221.0.0/16
128.221.222.0/24 128.221.0.0/16
128.221.223.0/24 128.221.0.0/16
128.221.224.0/24 128.221.0.0/16
128.221.225.0/24 128.221.0.0/16
128.221.226.0/24 128.221.0.0/16
128.221.227.0/24 128.221.0.0/16
128.221.228.0/24 128.221.0.0/16
128.221.230.0/24 128.221.0.0/16
128.221.231.0/24 128.221.0.0/16
128.221.232.0/24 128.221.0.0/16
128.221.233.0/24 128.221.0.0/16
128.221.234.0/24 128.221.0.0/16
128.221.235.0/24 128.221.0.0/16
128.221.236.0/24 128.221.0.0/16
128.221.237.0/24 128.221.0.0/16
128.221.239.0/24 128.221.0.0/16
132.237.141.0/24 132.237.0.0/16
137.69.112.0/24 137.69.0.0/16
137.69.113.0/24 137.69.0.0/16
137.69.117.0/24 137.69.0.0/16
137.69.120.0/24 137.69.0.0/16
137.69.121.0/24 137.69.0.0/16
137.69.125.0/24 137.69.0.0/16
137.69.126.0/24 137.69.0.0/16
137.69.127.0/24 137.69.0.0/16
147.178.2.0/24 147.178.0.0/16
147.178.4.0/24 147.178.0.0/16
147.178.5.0/24 147.178.0.0/16
147.178.6.0/24 147.178.0.0/16
147.178.7.0/24 147.178.0.0/16
147.178.8.0/24 147.178.0.0/16
147.178.9.0/24 147.178.0.0/16
152.62.44.0/24 152.62.0.0/16
152.62.45.0/24 152.62.0.0/16
152.62.46.0/24 152.62.0.0/16
152.62.47.0/24 152.62.0.0/16
152.62.60.0/24 152.62.0.0/16
152.62.62.0/24 152.62.0.0/16
152.62.63.0/24 152.62.0.0/16
152.62.97.0/24 152.62.0.0/16
152.62.108.0/24 152.62.0.0/16
152.62.109.0/24 152.62.0.0/16
152.62.110.0/24 152.62.0.0/16
152.62.112.0/24 152.62.0.0/16
152.62.113.0/24 152.62.0.0/16
152.62.115.0/24 152.62.0.0/16
152.62.118.0/24 152.62.0.0/16
152.62.154.0/24 152.62.0.0/16
152.62.155.0/24 152.62.0.0/16
152.62.163.0/24 152.62.0.0/16
152.62.164.0/24 152.62.0.0/16
152.62.165.0/24 152.62.0.0/16
152.62.166.0/24 152.62.0.0/16
152.62.168.0/24 152.62.0.0/16
152.62.176.0/23 152.62.0.0/16
152.62.184.0/24 152.62.0.0/16
152.62.185.0/24 152.62.0.0/16
152.62.186.0/24 152.62.0.0/16
152.62.187.0/24 152.62.0.0/16
152.62.193.0/24 152.62.0.0/16
152.62.204.0/24 152.62.0.0/16
152.62.213.0/24 152.62.0.0/16
163.244.72.0/24 163.244.0.0/16
168.159.160.0/24 168.159.0.0/16
168.159.161.0/24 168.159.0.0/16
168.159.162.0/24 168.159.0.0/16
168.159.163.0/24 168.159.0.0/16
168.159.164.0/24 168.159.0.0/16
168.159.165.0/24 168.159.0.0/16
168.159.166.0/24 168.159.0.0/16
168.159.167.0/24 168.159.0.0/16
168.159.168.0/24 168.159.0.0/16
168.159.169.0/24 168.159.0.0/16
168.159.170.0/24 168.159.0.0/16
168.159.171.0/24 168.159.0.0/16
168.159.172.0/24 168.159.0.0/16
168.159.173.0/24 168.159.0.0/16
168.159.174.0/24 168.159.0.0/16
168.159.175.0/24 168.159.0.0/16
168.159.212.0/24 168.159.0.0/16
168.159.213.0/24 168.159.0.0/16
168.159.215.0/24 168.159.0.0/16
168.159.228.0/24 168.159.0.0/16
198.161.247.0/24 198.161.246.0/23
137.69.118.0/24 137.69.0.0/16
163.244.40.0/24 163.244.0.0/16
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 128.221.236.0/24 Announced
+ 152.62.204.0/24 Announced
+ 152.62.213.0/24 Announced
- 137.69.118.0/24 Withdrawn
- 163.244.40.0/24 Withdrawn
whois: 402603
IANA has recorded AS12257 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS12257\n
#
# 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/
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# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
ASNumber: 12257
ASName: EMC-AS12257
ASHandle: AS12257
RegDate: 1999-05-03
Updated: 2023-03-20
Ref: https://rdap.arin.net/registry/autnum/12257
OrgName: Dell, Inc.
OrgId: DCC-25
Address: One Dell Way
City: Round Rock
StateProv: TX
PostalCode: 78682
Country: US
RegDate: 1990-09-26
Updated: 2024-11-25
Ref: https://rdap.arin.net/registry/entity/DCC-25
OrgDNSHandle: PRESS58-ARIN
OrgDNSName: Pressley, James
OrgDNSPhone: +1-214-326-9581
OrgDNSEmail: james.pressley@dell.com
OrgDNSRef: https://rdap.arin.net/registry/entity/PRESS58-ARIN
OrgTechHandle: ANDER430-ARIN
OrgTechName: Anderson, Colm
OrgTechPhone: +0035312795000
OrgTechEmail: colm.anderson@dell.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANDER430-ARIN
OrgDNSHandle: ANDER430-ARIN
OrgDNSName: Anderson, Colm
OrgDNSPhone: +0035312795000
OrgDNSEmail: colm.anderson@dell.com
OrgDNSRef: https://rdap.arin.net/registry/entity/ANDER430-ARIN
OrgTechHandle: PRESS58-ARIN
OrgTechName: Pressley, James
OrgTechPhone: +1-214-326-9581
OrgTechEmail: james.pressley@dell.com
OrgTechRef: https://rdap.arin.net/registry/entity/PRESS58-ARIN
OrgAbuseHandle: OPERA394-ARIN
OrgAbuseName: Operations Center
OrgAbusePhone: +1-866-434-8368
OrgAbuseEmail: ipregistrars.abuse@dell.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/OPERA394-ARIN
OrgNOCHandle: OPERA394-ARIN
OrgNOCName: Operations Center
OrgNOCPhone: +1-866-434-8368
OrgNOCEmail: ipregistrars.abuse@dell.com
OrgNOCRef: https://rdap.arin.net/registry/entity/OPERA394-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.
#