AS401866 — MASTER-IT-SUPPORT MITSUPP
AS Name: MASTER IT SUPPORT
Description: Master IT Support LLC
Registry: ARIN
Imports from (1)
Exports to (3)
aut-num: AS401866
as-name: MASTER IT SUPPORT
descr: Master IT Support LLC
import: from AS-ANY accept ANY
export: to AS-ANY announce AS401866:AS-ALL
mp-export: afi ipv6 to AS-ANY announce AS401866:AS-ALL-IPV6
admin-c: ADMIN9090-ARIN
tech-c: NETWO10307-ARIN
mnt-by: MNT-MISL-33
created: 2026-08-15T13:56:14Z
last-modified: 2026-08-15T13:56:14Z
source: ARIN
Direct Membership
Macros that directly list AS401866 as a member:
AS400333:AS-ALL-IPV6(2 members)
AS400333:AS-ALL-IPV4(2 members)
AS394590:AS-ALL-IPV6(3 members)
AS399881:AS-ALL(5 members)
AS399881:AS-ALL-IPV6(5 members)
AS46962:AS-ALL(10 members)
AS46962:AS-ALL-IPV6(10 members)
AS-OVH(146 members)
AS-CDN77(329 members)
Expanded Membership
All macros containing AS401866 (directly or via nested macros): 380
Show 100 macros
AS400333:AS-ALL-IPV4(2 ASNs)
AS400333:AS-ALL-IPV6(2 ASNs)
AS394590:AS-ALL-IPV6(3 ASNs)
AS399881:AS-ALL(5 ASNs)
AS399881:AS-ALL-IPV6(5 ASNs)
AS46962:AS-ALL(10 ASNs)
AS46962:AS-ALL-IPV6(10 ASNs)
AS396998:AS-CUSTOMERS-5(109 ASNs)
AS-OVH(146 ASNs)
AS6208:AS-CUSTOMERS(179 ASNs)
AS41494:AS-INTERLAN-CUSTOM(321 ASNs)
AS6453:AS-CUSTOMERS-V6(403 ASNs)
AS-GLOBEINTERNET-IPV6(404 ASNs)
AS198792:AS-PEER-AMSIX-V6(1,625 ASNs)
AS-CDN77(2,337 ASNs)
AS-DENINET6(2,424 ASNs)
AS-OMONIA(2,842 ASNs)
AS-GIGANET(2,869 ASNs)
AS-MAGYARTELEKOM6(2,890 ASNs)
AS-DENINET(2,924 ASNs)
AS-NEXTHOP-AU(3,394 ASNs)
AS-SFMIX-RS(3,979 ASNs)
AS38439:AS-PEERS(3,980 ASNs)
AS-MAINONE(4,898 ASNs)
AS-PATH(5,596 ASNs)
AS396998:AS-ALL(5,596 ASNs)
AS396998:AS-CUSTOMERS(5,596 ASNs)
AS264129:AS-FLIP(5,712 ASNs)
AS28263:AS-CUSTOMER-TELNETS(5,752 ASNs)
AS-TELNETS-264556(5,781 ASNs)
AS28263:AS-PEERING(5,803 ASNs)
AS28263:AS-ENSITE(6,008 ASNs)
AS7474:AS-CUSTOMERS(6,144 ASNs)
AS7474:AS-OPTUS(6,145 ASNs)
AS-RTD(6,186 ASNs)
AS-LIQUID(6,233 ASNs)
AS-ORANGERO(6,233 ASNs)
AS-TDATANETEU(6,531 ASNs)
AS-TDATANET(6,679 ASNs)
AS-OPTUS(7,043 ASNs)
AS28287:AS-PEERING(7,548 ASNs)
AS265126:AS-PEERING(7,549 ASNs)
AS28287:AS-ASSIM(7,549 ASNs)
AS262493:AS-CONE(7,550 ASNs)
AS262493:AS-TRANSIT(7,550 ASNs)
AS265126:AS-FLEETNET(7,550 ASNs)
AS-CABOTELECOM-CUST(7,740 ASNs)
AS-UUNETEUUK(8,356 ASNs)
AS702:AS-UK-CUSTOMER(8,356 ASNs)
AS-999-CORIX(9,091 ASNs)
AS-AORTA(11,961 ASNs)
AS6830:AS-AORTA(11,961 ASNs)
AS-SET-SEACOM(12,587 ASNs)
AS41073:AS-INEX-PEERS(14,843 ASNs)
AS-VOXILITY-SET(15,206 ASNs)
AS-SEABORN-CUSTOMER(16,137 ASNs)
AS-SEABORN-CORE(16,222 ASNs)
AS-RDSNET(16,878 ASNs)
AS-RDSTRANSIT(16,878 ASNs)
AS-MAGYARTELEKOM(17,357 ASNs)
AS-MATAV(17,357 ASNs)
AS-CLOUD-IX-M(17,536 ASNs)
AS-CLOUD-IX(17,641 ASNs)
AS-CITYTELECOM(17,663 ASNs)
AS-HOSTER(17,663 ASNs)
AS-SEABORN(17,733 ASNs)
AS-SPBROUTESERVER(17,816 ASNs)
AS-CN2(17,842 ASNs)
AS-WIOCC(18,067 ASNs)
AS-STIX(18,626 ASNs)
AS-1031-PEER1(18,971 ASNs)
AS-LINKBRASIL-271253(19,032 ASNs)
AS271253:AS-CUSTOMERS(19,032 ASNs)
AS-ST1-PEERINGS(19,133 ASNs)
AS198792:AS-PEER-AMSIX-V4(19,486 ASNs)
AS-COMCAST-IBONE(19,609 ASNs)
AS-NOTSURFNET-PEERS(19,650 ASNs)
AS-EDGEUNO(19,687 ASNs)
AS-AS53013(20,143 ASNs)
AS-T-CIX-V6(22,807 ASNs)
AS-VSNL-IN(23,661 ASNs)
AS30781:AS-JAGUAR-PEERING-TIX(24,490 ASNs)
AS3491:AS-CUSTOMERS-NA(25,092 ASNs)
AS-RETN-HK(26,343 ASNs)
AS47214:AS-LILLIX(26,738 ASNs)
AS55176:AS-MEMBERS(29,827 ASNs)
AS-IXPLAY(30,348 ASNs)
AS-STARTNIX-EU(30,348 ASNs)
AS-DECIX-LIS-V6(32,541 ASNs)
AS43729:AS-DECIX-LIS-V6(32,541 ASNs)
AS-DECIX-ASE(34,557 ASNs)
AS38137:AS-DECIX-ASE(34,557 ASNs)
AS30781:AS-JAGUAR-PEERING-V6-EQUINIX-PA(34,681 ASNs)
AS-DECIX-LIS(34,749 ASNs)
AS43729:AS-DECIX-LIS(34,749 ASNs)
AS-T-CIX(36,150 ASNs)
AS30781:AS-JAGUAR-PEERING-EQUINIX-PA(37,230 ASNs)
AS-TORIX(37,868 ASNs)
AS-MTU(38,044 ASNs)
AS-RNDROUTESERVER(38,077 ASNs)
... and 280 more
Upstream AS Paths
39 unique paths, avg length 3.2
AS Looking Glass
Upstream paths (matching graph above)
All 39 Upstream Paths
Complete list of all observed paths
AS401866 IPv4 Address Subnets (1)
| 23.143.4.0/24 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
AS401866 IPv6 Address Subnets (10)
| 2604:19a0:1::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
| 2604:19a0:2::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
| 2604:19a0:3::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
| 2604:19a0:4::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
| 2604:19a0:5::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
| 2604:19a0:6::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
| 2604:19a0:7::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
| 2604:19a0:8::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
| 2604:19a0:9::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |
| 2604:19a0:a::/48 | 🇵🇷 PR | Master IT Support | MASTER IT SUPPORT |